Front view of a skeleton of an adult human
Back view of a skeleton of an adult human The human skeleton consists of both fused and individual bones supported and supplemented by ligaments, tendons, muscles and cartilage. It serves as a scaffold which supports organs, anchors muscles, and protects organs such as the brain, lungs and heart. Image File history File links No higher resolution available. ...
Image File history File links No higher resolution available. ...
Image File history File links Human_skeleton_back. ...
Image File history File links Human_skeleton_back. ...
This article is about the skeletal organs. ...
In anatomy, the term ligament is used to denote three different types of structures:[1] Fibrous tissue that connects bones to other bones. ...
For other uses, see Tendon (disambiguation). ...
For other uses of Muscle, see Muscle (disambiguation). ...
Cartilage is a type of dense connective tissue. ...
A human brain. ...
For the village in Tibet, see Lung, Tibet. ...
The heart and lungs, from an older edition of Grays Anatomy. ...
The longest and heaviest bone in the body is the femur and the smallest is the stapes bone in the middle ear. In an adult, the skeleton comprises around 20% of the total body weight. The stapes or stirrup is the stirrup-shaped small bone or ossicle in the middle ear which attaches the incus to the fenestra ovalis, the oval window which is adjacent to the vestibule of the inner ear. ...
Fused bones include those of the pelvis and the cranium. Not all bones are interconnected directly: There are six bones in the middle ear called the ossicles (three on each side) that articulate only with each other. The hyoid bone, which is located in the neck and serves as the point of attachment for the tongue, does not articulate with any other bones in the body, being supported by muscles and ligaments. The pelvis (pl. ...
Cranium can mean: The brain and surrounding skull, a part of the body. ...
The middle ear is the portion of the ear internal to the eardrum, and external to the oval window of the cochlea. ...
The ossicles (also called auditory ossicles) are the three smallest bones in the human body. ...
The hyoid bone (Os Hyoideum; Lingual Bone) is a bone in the human neck, not articulated to any other bone; it is supported by the muscles of the neck and in turn supports the root of the tongue. ...
For other uses, see Tongue (disambiguation). ...
Development
Early in gestation, a fetus has a cartilaginous skeleton from which the long bones and most other bones gradually form throughout the remaining gestation period and for years after birth in a process called endochondral ossification. The flat bones of the skull and the clavicles are formed from connective tissue in a process known as intramembranous ossification, and ossification of the mandible occurs in the fibrous membrane covering the outer surfaces of Meckel's cartilages. At birth a newborn baby has approximately 270 bones, whereas on average an adult human has 206 bones (these numbers can vary slightly from individual to individual). The difference comes from a number of small bones that fuse together during growth, such as the sacrum and coccyx of the vertebral column. The sacrum (the bone at the base of the spine) consists of five bones which are separate at birth but fuse together into a solid structure in later years. An infant is born with zones of cartilage, called epiphyseal plates, between segments of bone to allow further growth. Growing is usually completed between ages 13 and 18, at which time the epiphyseal plates of long bones close allowing no further growth. Gestation is the carrying of an embryo or fetus inside a female viviparous animal. ...
For other uses, see Fetus (disambiguation). ...
The long bones are those that are longer than they are wide, and grow primarily by elongation of the diaphysis, with an epiphysis at the ends of the growing bone. ...
Section of fetal bone of cat. ...
For other uses of Skull, see Skull (disambiguation). ...
Collarbone and collar bone redirect here. ...
Osteoblasts and osteoclasts on trabecula of lower jaw of calf embryo. ...
Figure 3: Mandible of human embryo 24 mm. ...
The cartilaginous bar of the mandibular arch is formed by what are known as Meckelâs cartilages (right and left) ; above this the incus is developed. ...
For the record label, see Sacrum Torch. ...
The coccyx is formed of up to five vertebrae. ...
The vertebral column seen from the side Different regions (curvatures) of the vertebral column The vertebral column (backbone or spine) is a column of vertebrae situated in the dorsal aspect of the abdomen. ...
Look up spine on Wiktionary, the free dictionary. ...
The long bones are those that are longer than they are wide, and grow primarily by elongation of the diaphysis at an epiphysis at one end of the growing bone. ...
Segmental pattern Much of the human skeleton maintains the ancient segmental pattern present in all vertebrates (mammals, birds, fishes, reptiles and amphibians) with basic units being repeated. This segmental pattern is particularly evident in the vertebral column and in the ribcage. For other uses, see Skeleton (disambiguation). ...
This article does not cite any references or sources. ...
Organization The human skeleton can be divided into the axial skeleton and the appendicular skeleton. diagram of the axial skeleton The axial skeleton consists of the 80 bones in the head and trunk of the human body. ...
Appendicular skeleton diagram The appendicular skeleton, consisting of 126 bones, makes body movement possible and protects the organs of digestion, excretion, and reproduction. ...
Bones - See also: List of bones of the human skeleton
There are 206 bones in the matured adult human body, but this number can vary slightly from individual to individual.[1] A typical adult human skeleton consists of the following 206 bones depending on age, though this number does vary owing to a variety of anatomical variations; for example, a small portion of the human population have an extra rib, or an extra lumbar vertebra. ...
Function The skeleton has six main functions:
Support The skeleton provides the framework which supports the body, and maintains its shape. The joints between bones permit movement, some allowing a wider range of movement than others, e.g. the ball and socket joint allows a greater range of movement than the pivot joint at the neck.
Movement Movement in vertebrates is powered by skeletal muscles, which are attached to the skeleton by tendons. Without the skeleton to give leverage, movement would be greatly restricted. However, biologically speaking, the skeleton does not enable movement. This article does not cite any references or sources. ...
Leverage redirects here. ...
Protection The skeleton protects many vital organs: This article is about the biological unit. ...
For other uses of Skull, see Skull (disambiguation). ...
A human brain. ...
For other uses, see Eye (disambiguation). ...
The middle ear is the portion of the ear internal to the eardrum, and external to the oval window of the cochlea. ...
Inner ear The inner ear is the bony labyrinth, a system of passages comprising two main functional parts: the organ of hearing, or cochlea and the vestibular apparatus, the organ of balance that consists of three semicircular canals and the vestibule. ...
The vertebral column seen from the side Different regions (curvatures) of the vertebral column The vertebral column (backbone or spine) is a column of vertebrae situated in the dorsal aspect of the abdomen. ...
The Spinal cord nested in the vertebral column. ...
This article is about the bones called ribs. ...
The sternum (from Greek ÏÏÎÏνον, sternon, chest) or breastbone is a long, flat bone located in the center of the thorax (chest). ...
For the village in Tibet, see Lung, Tibet. ...
The heart and lungs, from an older edition of Grays Anatomy. ...
For transport in plants, see Vascular tissue. ...
Collarbone and collar bone redirect here. ...
Left scapula - front view () Left scapula - rear view () In anatomy, the scapula, or shoulder blade, is the bone that connects the humerus (arm bone) with the clavicle (collar bone). ...
This article is about the body part. ...
The ilium of the pelvis is divisible into two parts, the body and the ala; the separation is indicated on the internal surface by a curved line, the arcuate line, and on the external surface by the margin of the acetabulum. ...
In anatomy, the hip is the bony projection of the femur which is known as the greater trochanter, and the overlying muscle and fat. ...
For other uses, see Patella (disambiguation). ...
The ulna (Elbow Bone) [Figs. ...
For other uses, see Knee (disambiguation). ...
Elbow redirects here. ...
This article is about Carpal bones. ...
FIG. 268â Bones of the right foot. ...
For the municipality in Germany, see Wrist, Germany. ...
For a review of anatomical terms, see Anatomical position and Anatomical terms of location. ...
Blood cell production The skeleton is the site of haematopoiesis, which takes place in red bone marrow. Diagram that shows the development of different blood cells from hematopoietic stem cell to mature cells Haematopoiesis (from Ancient Greek: haima blood; poiesis to make) (or hematopoiesis in the United States; sometimes also haemopoiesis or hemopoiesis) is the formation of blood cellular components. ...
For the Dir en grey album, see The Marrow of a Bone. ...
Storage Bone matrix can store calcium and is involved in calcium metabolism, and bone marrow can store iron in ferritin and is involved in iron metabolism. For other uses, see Calcium (disambiguation). ...
Calcium Calcium metabolism or calcium homeostasis is the mechanism by which the body maintains adequate calcium levels. ...
For the Dir en grey album, see The Marrow of a Bone. ...
Fe redirects here. ...
Ferritin is a globular protein found mainly in the liver, which can store about 4500 iron (Fe3+)ions in a hollow protein shell made of 24 subunits. ...
Human beings use 20 mg of iron each day for the production of new red blood cells, much of which is recycled from old red blood cells. ...
Endocrine regulation Bone cells release a hormone called osteocalcin, which controls the regulation of blood sugar (glucose) and fat deposition. Osteocalcin increases both the secretion and sensitivity of insulin, in addition to boosting the number of insulin-producing cells and reducing stores of fat.[2] Osteocalcin is a protein found in bone and dentin; that plays a role in mineralization and calcium ion homeostasis ...
In medicine, blood sugar is a term used to refer to levels of glucose in the blood. ...
Glucose (Glc), a monosaccharide (or simple sugar), is an important carbohydrate in biology. ...
In biochemistry, fat is a generic term for a class of lipids. ...
Not to be confused with inulin. ...
Beta cells are a type of cell in the pancreas in areas called the islets of Langerhans. ...
Sex-based differences An articulated human skeleton, as used in biology education There are many differences between the male and female human skeletons. Most prominent is the difference in the pelvis, owing to characteristics required for the processes of childbirth. The shape of a female pelvis is flatter, more rounded and proportionally larger to allow the head of a fetus to pass. Men tend to have slightly thicker and longer limbs and digit bones (phalanges), while women tend to have narrower rib cages, smaller teeth, less angular mandibles, less pronounced cranial features such as the brow ridges and external occipital protuberance (the small bump at the back of the skull), and the carrying angle of the forearm is more pronounced in females. Females also tend to have more rounded shoulder blades. Parturition redirects here. ...
The phalanges in a human hand The name Phalanges is commonly given to the bones that form fingers and toes. ...
This article is about the bones called ribs. ...
The mandible (from Latin mandibÅla, jawbone) or inferior maxillary bone is, together with the maxilla, the largest and strongest bone of the face. ...
The inion is the most prominent projection of the occipital bone at the lower rear part of the skull. ...
Disorders - See also: List of skeletal disorders
There are many disorders of the skeleton. One of the more prominent is osteoporosis. This is a list of skeletal disorders, these affect the development and structure of the skeletal system. ...
Osteoporosis is a disease of bone that leads to an increased risk of fracture. ...
Osteoporosis -
Main article: Osteoporosis Osteoporosis is a disease of bone - leading to an increased risk of fracture. In osteoporosis, the bone mineral density (BMD) is reduced, bone microarchitecture is disrupted, and the amount and variety of non-collagenous proteins in bone is altered. Osteoporosis is defined by the World Health Organization (WHO) in women as a bone mineral density 2.5 standard deviations below peak bone mass (20-year-old sex-matched healthy person average) as measured by DXA; the term "established osteoporosis" includes the presence of a fragility fracture.[3] Osteoporosis is most common in women after the menopause, when it is called postmenopausal osteoporosis, but may develop in men and premenopausal women in the presence of particular hormonal disorders and other chronic diseases or as a result of smoking and medications, specifically glucocorticoids, when the disease is called steroid- or glucocorticoid-induced osteoporosis (SIOP or GIOP). Osteoporosis is a disease of bone that leads to an increased risk of fracture. ...
This article is about the medical term. ...
This article is about the skeletal organs. ...
Internal and external views of an arm with a compound fracture, both before and after surgery A bone fracture is a medical condition in which a bone has cracked or broken. ...
A bone mineral density (BMD) test, also called a bone mass measurement, is used to measure bone density and determine fracture risk for osteoporosis. ...
Tropocollagen triple helix. ...
WHO redirects here. ...
In probability and statistics, the standard deviation of a probability distribution, random variable, or population or multiset of values is a measure of statistical dispersion of its values. ...
A scanner used to measure bone density with dual energy X-ray absorptiometry. ...
A fragility fracture is one that occurs as a result of a fall from standing height or less. ...
The word menopause literally means the permanent physiological, or natural, cessation of menstrual cycles, from the Greek roots meno (month) and pausis (a pause, a cessation). ...
In medicine, a chronic disease is a disease that is long-lasting or recurrent. ...
The cigarette is the most common method of smoking tobacco. ...
A medication is a drug or substance taken to reduce symptoms or cure an illness or medical condition. ...
Glucocorticoids are a class of steroid hormones characterised by an ability to bind with the cortisol receptor and trigger similar effects. ...
Osteoporosis can be prevented with lifestyle advice and medication, and preventing falls in people with known or suspected osteoporosis is an established way to prevent fractures.Osteoporosis can also be prevented with having a good source of calcium and Vitmin D. Osteoporosis can be treated with bisphosphonates and various other medical treatments. In pharmacology, bisphosphonates (also called: diphosphonates) is a class of drugs that inhibits the resorption of bone. ...
Gallery Drawing of the reverse of a female skeleton giving an impression of the location relative to surface markings Image File history File links Download high-resolution version (609x1165, 138 KB) Plastische Anatomie des menschlichen Körpers für Künstler und freunde der kunst von Dr. Julius Kollmann o. ...
| A medical drawing by a German physician from 1910 Image File history File links Size of this preview: 289 à 600 pixels Full resolution (2280 à 4732 pixel, file size: 474 KB, MIME type: image/gif) Plastische Anatomie des menschlichen Körpers für Künstler und freunde der kunst von Dr. Julius Kollmann o. ...
| Annotated skeleton Image File history File links Download high resolution version (874x2089, 235 KB) Original caption: Fig. ...
| References - ^ The Bones - The Human Body - BBC World Service
- ^ Lee, Na Kyung; et al. (August 2007). "Endocrine Regulation of Energy Metabolism by the Skeleton". Cell 130: 456-469. doi:10.1016.
- ^ WHO (1994). "Assessment of fracture risk and its application to screening for postmenopausal osteoporosis. Report of a WHO Study Group". World Health Organization technical report series 843: 1–129. PMID 7941614.
A digital object identifier (or DOI) is a standard for persistently identifying a piece of intellectual property on a digital network and associating it with related data, the metadata, in a structured extensible way. ...
See also | Bones of head and neck: the facial bones of the skull | | | Maxilla | | Surfaces | Anterior: fossae ( Incisive fossa, Canine fossa) - Infraorbital foramen - Anterior nasal spine Infratemporal: Alveolar canals - Maxillary tuberosity This article is about the skeletal organs. ...
diagram of the axial skeleton The axial skeleton consists of the 80 bones in the head and trunk of the human body. ...
Appendicular skeleton diagram The appendicular skeleton, consisting of 126 bones, makes body movement possible and protects the organs of digestion, excretion, and reproduction. ...
The vertebral column seen from the side Different regions (curvatures) of the vertebral column The vertebral column (backbone or spine) is a column of vertebrae situated in the dorsal aspect of the abdomen. ...
A diagram of a thoracic vertebra. ...
In vertebrates, cervical vertebrae (singular: vertebra) are those vertebrae immediately behind (caudal to) the skull. ...
A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ...
The lumbar vertebrae are the largest segments of the movable part of the vertebral column, and are characterized by the absence of the foramen transversarium within the transverse process, and by the absence of facets on the sides of the body. ...
For the record label, see Sacrum Torch. ...
The coccyx is formed of up to five vertebrae. ...
Male Chest The chest is a part of the anatomy of humans and various other animals. ...
The sternum (from Greek ÏÏÎÏνον, sternon, chest) or breastbone is a long, flat bone located in the center of the thorax (chest). ...
The human rib cage is a part of the human skeleton within the thoracic area. ...
For other uses of Skull, see Skull (disambiguation). ...
The occipital bone, a saucer-shaped membrane bone situated at the back and lower part of the cranium, is trapezoid in shape and curved on itself. ...
The parietal bones (os parietale) are bones in the human skull and form, by their union, the sides and roof of the cranium. ...
The frontal bone (os frontale, TA: A02. ...
The temporal bones (os temporales) are situated at the sides and base of the skull. ...
The sphenoid bone (from Greek sphenoeides, wedgelike) is a bone situated at the base of the skull in front of the temporals and basilar part of the occipital bone. ...
Your skull is in your back (this is obviously not true, I was just testing the website to see if it really works) The ethmoid bone (os ethmoidale) is a bone in the skull that separates the nasal cavity from the brain. ...
For other uses of Skull, see Skull (disambiguation). ...
The Nasal Bones (Ossa Faciei & Ossa Nasalia) are two small oblong bones, varying in size and form in different individuals; they are placed side by side at the middle and upper part of the face, and form, by their junction, the bridge of the nose. ...
The maxilla (plural: maxillae) is a fusion of two bones along the palatal fissure that form the upper jaw. ...
The lacrimal bone (Os Lacrimale), the smallest and most fragile bone of the face, is situated at the front part of the medial wall of the orbit . ...
The zygomatic bone (malar bone) is a paired bone of the human skull. ...
The palatine bone is a bone situated at the back part of the nasal cavity between the maxilla and the pterygoid process of the sphenoid. ...
The inferior nasal concha (Inferior Turbinated Bone) extends horizontally along the lateral wall of the nasal cavity [Fig. ...
The vomer bone is one of the unpaired facial bones of the skull. ...
The mandible (from Latin mandibÅla, jawbone) or inferior maxillary bone is, together with the maxilla, the largest and strongest bone of the face. ...
The hyoid bone (Os Hyoideum; Lingual Bone) is a bone in the human neck, not articulated to any other bone; it is supported by the muscles of the neck and in turn supports the root of the tongue. ...
The hyoid bone (Os Hyoideum; Lingual Bone) is a bone in the human neck, not articulated to any other bone; it is supported by the muscles of the neck and in turn supports the root of the tongue. ...
The greater cornua project backward from the lateral borders of the body; they are flattened from above downward and diminish in size from before backward; each ends in a tubercle to which is fixed the lateral hyothyroid ligament. ...
The hyoid bone (Lingual Bone) is a bone in the human neck, not articulated to any other bone; it is supported by the muscles of the neck and in turn supports the root of the tongue. ...
The body of hyoid bone or central part is of a quadrilateral form. ...
In humans, the upper limb is an anatomical term for the limb that is attached to the pectoral girdle. ...
The pectoral girdle is the set of bones which connect the upper limb to the axial skeleton on each side. ...
Collarbone and collar bone redirect here. ...
Left scapula - front view () Left scapula - rear view () In anatomy, the scapula, or shoulder blade, is the bone that connects the humerus (arm bone) with the clavicle (collar bone). ...
This article is about upper limb of an animal. ...
The humerus is a long bone in the arm or fore-legs (animals) that runs from the shoulder to the elbow. ...
The ulna (Elbow Bone) [Figs. ...
The radius is the bone of the forearm that extends from the outside of your limb to your phlangx (lateral) of the elbow to the thumb side of the wrist. ...
For other uses, see Hand (disambiguation). ...
This article is about Carpal bones. ...
The scaphoid bone (hand navicular) of the wrist is found on the thumb side of the hand, within the anatomical snuffbox. ...
The lunate bone (os lunatum; semilunar bone) is a bone in the human hand that may be distinguished by its deep concavity and crescentic outline. ...
The triquetral bone (also called triquetral, os triquetrum, cuneiform bone, pyramidal bone, cubital bone, os pyramidale, os triangulare, three-cornered bone, and triangular bone) is a type of carpal bone. ...
The left pisiform bone. ...
The trapezium is a bone in the human hand. ...
In human anatomy, the trapezoid bone (lesser multangular bone; os multangulum minus) is a bone in the hands. ...
The capitate bone (os capitatum; os magnum) is a bone in the human hand. ...
The hamate bone (os hamatum; unciform bone) is a bone in the human hand that may be readily distinguished by its wedge-shaped form, and the hook-like process which projects from its volar surface. ...
The metacarpus is the intermediate part of the hand skeleton that is located between the fingers distally and the carpus which forms the connection to the forearm. ...
Proximal phalanges are bones found in the limbs of most vertebrates. ...
Intermediate phalanges are bones found in the limbs of most vertebrates. ...
Distal phalanges are bones found in the limbs of most vertebrate skeletons. ...
In humans, the lower limb is an anatomical term for the limb that is attached to the pelvic girlde, what is commonly referred to as the leg. ...
Human male pelvis, viewed from front Human female pelvis, viewed from front The pelvis is the bony structure located at the base of the spine (properly known as the caudal end). ...
The pelvis (pl. ...
The ilium of the pelvis is divisible into two parts, the body and the ala; the separation is indicated on the internal surface by a curved line, the arcuate line, and on the external surface by the margin of the acetabulum. ...
Human male pelvis, viewed from front Human female pelvis, viewed from front The pelvis is the bony structure located at the base of the spine (properly known as the caudal end). ...
The pubis, the anterior part of the hip bone, is divisible into a body, a superior and an inferior ramus. ...
Diagram of an insect leg A leg is the part of an animals body that supports the rest of the animal above the ground and is used for locomotion. ...
The femur or thigh bone is the longest, most voluminous, and strongest bone of the mammalian bodies. ...
For other uses, see Patella (disambiguation). ...
For other uses see fibula (disambiguation) The fibula or calf bone is a bone placed on the lateral side of the tibia, with which it is connected above and below. ...
This article is about the vertebrate bone. ...
For other uses, see Foot (disambiguation). ...
FIG. 268â Bones of the right foot. ...
The calcaneus is the large bone making up the heel of the human foot. ...
See talus for other meanings of the word The talus bone or astragalus of the ankle joint connects the leg to the foot. ...
The navicular bone occurs in human and horse anatomy. ...
There are three cuneiform bones in the human foot: the medial cuneiform, the intermediate cuneiform and the lateral cuneiform. ...
The cuboid bone is one of seven Tarsal bones. ...
The metatarsus consists of the five long bones of the foot, which are numbered from the medial side (ossa metatarsalia I.-V.); each presents for examination a body and two extremities. ...
Proximal phalanges are bones found in the limbs of most vertebrates. ...
Intermediate phalanges are bones found in the limbs of most vertebrates. ...
Distal phalanges are bones found in the limbs of most vertebrate skeletons. ...
The ossicles (also called auditory ossicles) are the three smallest bones in the human body. ...
The malleus is hammer-shaped small bone or ossicle of the middle ear which connects with the incus and is attached to the inner surface of the eardrum. ...
This article refers to a bone in the mammalian ear. ...
The stapes or stirrup is the stirrup-shaped small bone or ossicle in the middle ear which attaches the incus to the fenestra ovalis, the oval window which is adjacent to the vestibule of the inner ear. ...
This article is about the skeletal organs. ...
An MRI scan of the head. ...
In humans, the adult skull is normally made up of 22 bones. ...
The maxilla (plural: maxillae) is a fusion of two bones along the palatal fissure that form the upper jaw. ...
The anterior surface is directed forward and lateralward. ...
On the anterior surface of the maxilla, just above the eminences corresponding to the incisor teeth is a depression, the incisive fossa, which gives origin to the Depressor alæ nasi; to the alveolar border below the fossa is attached a slip of the Orbicularis oris; above and a little lateral...
Lateral to the incisive fossa is another depression, the canine fossa; it is larger and deeper than the incisive fossa, and is separated from it by a vertical ridge, the canine eminence, corresponding to the socket of the canine tooth; the canine fossa gives origin to the Caninus. ...
Above the canine fossa is the infraorbital foramen, the end of the infraorbital canal; it transmits the infraorbital vessels and nerve. ...
Medially, the anterior surface of the maxilla is limited by a deep concavity, the nasal notch, the margin of which gives attachment to the Dilatator naris posterior and ends below in a pointed process, which with its fellow of the opposite side forms the anterior nasal spine. ...
The infratemporal surface is convex, directed backward and lateralward, and forms part of the infratemporal fossa. ...
The infratemporal surface of the maxilla is pierced about its center by the apertures of the alveolar canals, which transmit the posterior superior alveolar vessels and nerves. ...
At the lower part of the infratemporal surface of the maxilla is a rounded eminence, the maxillary tuberosity, especially prominent after the growth of the wisdom tooth; it is rough on its lateral side for articulation with the pyramidal process of the palatine bone and in some cases articulates with...
Orbital: Infraorbital groove - Infraorbital canal The orbital surface is smooth and triangular, and forms the greater part of the floor of the orbit. ...
Near the middle of the posterior part of the orbital surface of the maxilla is the infraorbital groove (or sulcus), for the passage of the infraorbital vessels and nerve. ...
One of the canals of the orbital surface of the maxilla, the infraorbital canal, opens just below the margin of the orbit. ...
Nasal: Pterygopalatine canal | | | Processes | Zygomatic process Frontal process (Agger nasi, Anterior lacrimal crest) The nasal surface presents a large, irregular opening leading into the maxillary sinus. ...
The greater palatine canal (or pterygopalatine canal) is a passage in the skull that transmits the greater palatine artery, vein, and nerve between the pterygopalatine fossa and the oral cavity. ...
The zygomatic process of the maxilla (malar process) is a rough triangular eminence, situated at the angle of separation of the anterior, zygomatic, and orbital surfaces. ...
The frontal process of the maxilla (nasal process) is a strong plate, which projects upward, medialward, and backward, by the side of the nose, forming part of its lateral boundary. ...
The agger nasi is a small ridge on the lateral side of the nasal cavity. ...
The lateral margin of the lacrimal fossa is named the anterior lacrimal crest, and is continuous below with the orbital margin; at its junction with the orbital surface is a small tubercle, the lacrimal tubercle, which serves as a guide to the position of the lacrimal sac. ...
Alveolar process The alveolar process is the thickened ridge of bone that contains the tooth sockets on bones that bear teeth. ...
Palatine process ( Incisive foramen, Incisive canals, Foramina of Scarpa, Incisive bone, Anterior nasal spine) | | | Other | | | | | Zygomatic | | | | Palatine | | | | Mandible | | | Minor/ nose | Nasal bone: Internasal suture - Nasal foramina Inferior nasal concha: Ethmoidal process - Maxillary process The palatine process of the maxilla (palatal process), thick and strong, is horizontal and projects medialward from the nasal surface of the bone. ...
When the two maxillæ are articulated, a funnel-shaped opening, the incisive foramen, is seen in the middle line, immediately behind the incisor teeth. ...
In the opening of the incisive foramen, the orifices of two lateral canals are visible; they are named the incisive canals or foramina of Stenson; through each of them passes the terminal branch of the descending palatine artery and the nasopalatine nerve. ...
In the maxilla, occasionally two additional canals are present in the middle line of the palatine process; they are termed the foramina of Scarpa, and when present transmit the nasopalatine nerves, the left passing through the anterior, and the right through the posterior canal. ...
Medially, the anterior surface of the maxilla is limited by a deep concavity, the nasal notch, the margin of which gives attachment to the Dilatator naris posterior and ends below in a pointed process, which with its fellow of the opposite side forms the anterior nasal spine. ...
The body of the maxilla (corpus maxillae) is somewhat pyramidal in shape, and contains a large cavity, the maxillary sinus (antrum of Highmore). ...
The maxillary sinus is the largest paranasal sinus. ...
The zygomatic bone (malar bone) is a paired bone of the human skull. ...
Near the center of the temporal surface of the zygomatic bone is the zygomaticotemporal foramen for the transmission of the zygomaticotemporal nerve. ...
The malar surface of the zygomatic bone is convex and perforated near its center by a small aperture, the zygomaticofacial foramen, for the passage of the zygomaticofacial nerve and vessels; below this foramen is a slight elevation, which gives origin to the Zygomaticus. ...
The palatine bone is a bone situated at the back part of the nasal cavity between the maxilla and the pterygoid process of the sphenoid. ...
In the skull, the pterygopalatine fossa is the space between the lateral pterygoid plate (which is part of the sphenoid bone), and the palate. ...
The Pterygoid fossa, or the sphenoid bone is wedged between several other bones in the front of the cranium. ...
The horizontal part of the palatine bone (horizontal plate) is quadrilateral, and has two surfaces and four borders. ...
Its medial end of the posterior border of the horizontal plate of palatine bone is sharp and pointed, and, when united with that of the opposite bone, forms a projecting process, the posterior nasal spine for the attachment of the Musculus uvulæ. See also anterior nasal spine This article was...
The vertical part (perpendicular plate) of the palatine bone is thin, of an oblong form, and presents two surfaces and four borders. ...
The greater palatine canal (or pterygopalatine canal) is a passage in the skull that transmits the greater palatine artery, vein, and nerve between the pterygopalatine fossa and the oral cavity. ...
The processes of the superior border of the palatine bone are separated by the sphenopalatine notch, which is converted into the sphenopalatine foramen by the under surface of the body of the sphenoid. ...
The pyramidal process of the palatine bone projects backward and lateralward from the junction of the horizontal and vertical parts, and is received into the angular interval between the lower extremities of the pterygoid plates. ...
The orbital process of the palatine bone is placed on a higher level than the sphenoidal, and is directed upward and lateralward from the front of the vertical part, to which it is connected by a constricted neck. ...
The sphenoidal process is a thin, compressed plate, much smaller than the orbital, and directed upward and medialward. ...
The mandible (from Latin mandibÅla, jawbone) or inferior maxillary bone is, together with the maxilla, the largest and strongest bone of the face. ...
The body of the mandible is curved somewhat like a horseshoe and has two surfaces and two borders. ...
The external surface of the mandible is marked in the median line by a faint ridge, indicating the Symphysis menti or line of junction of the two pieces of which the bone is composed at an early period of life. ...
The symphysis of the external surface of the mandible divides below and encloses a triangular eminence, the mental protuberance, the base of which is depressed in the center but raised on either side to form the mental tubercle. ...
The mental foramen is a foramen in the mandible. ...
The mental spine is a small projection of bone on the posterior aspect of the mandible (jaw bone) in the midline. ...
Extending upward and backward on either side from the lower part of the symphysis of the Mandible is the mylohyoid line, which gives origin to the Mylohyoideus; the posterior part of this line, near the alveolar margin, gives attachment to a small part of the Constrictor pharyngis superior, and to...
(ramus mandibulæ; perpendicular portion) The ramus of the mandible is quadrilateral in shape, and has two surfaces, four borders, and two processes. ...
The margin of the mandibular foramen is irregular; it presents in front a prominent ridge, surmounted by a sharp spine, the lingula mandibulæ, which gives attachment to the sphenomandibular ligament; at its lower and back part is a notch from which the mylohyoid groove runs obliquely downward and forward, and...
The mandibular canal runs obliquely downward and forward in the ramus, and then horizontally forward in the body, where it is placed under the alveoli and communicates with them by small openings. ...
The Mandibular Foramen is an opening on the internal surface of the ramus for the mandibular vessels and nerve to pass. ...
At the junction of the lower border of the ramus of the mandible with the posterior border is the angle of the mandible, which may be either inverted or everted and is marked by rough, oblique ridges on each side, for the attachment of the Masseter laterally, and the Pterygoideus...
The coronoid processis a thin, triangular eminence, which is flattened from side to side and varies in shape and size. ...
The upper border of the ramus of mandible is thin, and is surmounted by two processes, the coronoid in front and the condyloid behind, separated by a deep concavity, the mandibular notch. ...
The condyloid process is thicker than the coronoid, and consists of two portions: the condyle, and the constricted portion which supports it, the neck. ...
The Nasal Bones (Ossa Faciei & Ossa Nasalia) are two small oblong bones, varying in size and form in different individuals; they are placed side by side at the middle and upper part of the face, and form, by their junction, the bridge of the nose. ...
The inferior nasal concha (Concha Nasalis Inferior; Inferior Turbinated Bone) extends horizontally along the lateral wall of the nasal cavity [Fig. ...
Behind the lacrimal process of the inferior nasal conchae lies a broad, thin plate, the ethmoidal process, which ascends to join the uncinate process of the ethmoid; from its lower border a thin lamina, the maxillary process, curves downward and lateralward; it articulates with the maxilla and forms a part...
For the embryological structure, see Maxillary prominence. ...
Vomer: Wing The vomer bone is one of the unpaired facial bones of the skull. ...
Lacrimal: Posterior lacrimal crest - Lacrimal groove - Lacrimal hamulus | | | Bones of head and neck: the cranium of the skull | | | Occipital | | | | Parietal | | | | Frontal | | | | Temporal | | | | | | | | | | | Carotid canal - Facial canal ( Hiatus) - Internal auditory meatus - Aqueduct of cochlea - Stylomastoid foramen fossae (Subarcuate fossa, Jugular fossa) - canaliculi (Inferior tympanic, Mastoid) - Styloid process - Petrosquamous suture The lacrimal bone (Os Lacrimale), the smallest and most fragile bone of the face, is situated at the front part of the medial wall of the orbit . ...
The lateral or orbital surface of the lacrimal bone is divided by a vertical ridge, the posterior lacrimal crest, into two parts. ...
On the nasal surface of the body of the maxilla, in front of the opening of the sinus is a deep groove, the lacrimal groove (or lacrimal sulcus), which is converted into the nasolacrimal canal, by the lacrimal bone and inferior nasal concha; this canal opens into the inferior meatus...
This article is about the skeletal organs. ...
An MRI scan of the head. ...
In humans, the adult skull is normally made up of 22 bones. ...
The occipital bone, a saucer-shaped membrane bone situated at the back and lower part of the cranium, is trapezoid in shape and curved on itself. ...
The squama of the occipital bone, situated above and behind the foramen magnum, is curved from above downward and from side to side. ...
The inion is the most prominent projection of the occipital bone at the lower rear part of the skull. ...
The inion is the most prominent projection of the occipital bone at the lower rear part of the skull. ...
The nuchal lines are four curved lines on the external surface of the occipital bone: The upper, often faintly marked, is named the highest nuchal line, and to it the galea aponeurotica is attached. ...
The internal surface of the occipital bone is deeply concave and divided into four fossæ by a cruciform eminence ( or cruciate eminence). ...
In the occipital bone, at the point of intersection of the four divisions of the cruciate eminence is the internal occipital protuberance. ...
The internal surface of the squama frontalis of the frontal bone is concave and presents in the upper part of the middle line a vertical groove, the sagittal sulcus, the edges of which unite below to form a ridge, the frontal crest; the sulcus lodges the superior sagittal sinus, while...
In the occipital bone, the lower division of the cruciate eminence is prominent, and is named the internal occipital crest; it bifurcates near the foramen magnum and gives attachment to the falx cerebelli; in the attached margin of this falx is the occipital sinus, which is sometimes duplicated. ...
The lateral parts of the occipital bone are situated at the sides of the foramen magnum; on their under surfaces are the condyles for articulation with the superior facets of the atlas. ...
The lateral parts of the occipital bone are situated at the sides of the foramen magnum; on their under surfaces are the occipital condyles for articulation with the superior facets of the atlas. ...
Behind either condyle of the lateral parts of occipital bone is a depression, the condyloid fossa (or condylar fossa), which receives the posterior margin of the superior facet of the atlas when the head is bent backward; the floor of this fossa is sometimes perforated by the condyloid canal, through...
In the lateral parts of occipital bone, behind either condyle is a depression, the condyloid fossa, which receives the posterior margin of the superior facet of the atlas when the head is bent backward; the floor of this fossa is sometimes perforated by the condylar canal (or condyloid canal), through...
The hypoglossal canal is a bony canal in the occipital bone of the skull that transmits the hypoglossal nerve from its point of entry near the medulla oblongata to its exit from the base of the skull near the jugular foramen. ...
In the lateral part of the occipital bone, extending lateralward from the posterior half of the condyle is a quadrilateral plate of bone, the jugular process, excavated in front by the jugular notch, which, in the articulated skull, forms the posterior part of the jugular foramen. ...
The upper surface of the lateral parts of occipital bone presents an oval eminence, the jugular tubercle, which overlies the hypoglossal canal and is sometimes crossed by an oblique groove for the glossopharyngeal, vagus, and accessory nerves. ...
The basilar part of the occipital bone extends forward and upward from the foramen magnum, and presents in front an area more or less quadrilateral in outline. ...
On the lower surface of the basilar part of occipital bone, about 1 cm. ...
In anatomy, in the occipital bone, the foramen magnum (Latin: great hole) is one of the several oval or circular apertures in the base of the skull (the foramina), through which the medulla oblongata (an extension of the spinal cord) enters and exits the skull vault. ...
The parietal bones (os parietale) are bones in the human skull and form, by their union, the sides and roof of the cranium. ...
The external surface of the parietal bone is convex, smooth, and marked near the center by an eminence, the parietal eminence (parietal tuber), which indicates the point where ossification commenced. ...
Crossing the middle of the parietal bone in an arched direction are two curved lines, the superior and inferior temporal lines; the former gives attachment to the temporal fascia, and the latter indicates the upper limit of the muscular origin of the Temporalis. ...
At the back part of the parietal bone and close to the upper or sagittal border is the parietal foramen, which transmits a vein to the superior sagittal sinus, and sometimes a small branch of the occipital artery; it is not constantly present, and its size varies considerably. ...
The frontal bone (os frontale, TA: A02. ...
There are two surfaces of the squama of the frontal bone: the external surface, and the internal surface. ...
The frontal suture (sutura frontalis) is a dense connective tissue structure that divides the two halves of the frontal bone of the skull in infants and children. ...
On the frontal bone, on either side of the frontal suture, about 3 cm. ...
On the squama frontalis of the frontal bone, below the frontal eminences, and separated from them by a shallow groove, are two arched elevations, the superciliary arches; these are prominent medially, and are joined to one another by a smooth elevation named the glabella. ...
The glabella is the space between the eyebrows and above the nose. ...
Arching transversely below the superciliary arches is the upper part of the margin of the orbit, thin and prominent in its lateral two-thirds, rounded in its medial third, and presenting, at the junction of these two portions, the supraorbital notch or foramen for the supraorbital nerve and vessels. ...
The frontal crest of the frontal bone ends below in a small notch which is converted into a foramen, the foramen cecum, by articulation with the ethmoid. ...
The supraorbital margin of the frontal bone ends laterally in the zygomatic process, which is strong and prominent, and articulates with the zygomatic bone. ...
The internal surface of the squama frontalis of the frontal bone is concave and presents in the upper part of the middle line a vertical groove, the sagittal sulcus, the edges of which unite below to form a ridge, the frontal crest; the sulcus lodges the superior sagittal sinus, while...
The internal surface of the squama frontalis of the frontal bone is concave and presents in the upper part of the middle line a vertical groove, the sagittal sulcus, the edges of which unite below to form a ridge, the frontal crest; the sulcus lodges the superior sagittal sinus, while...
The ethmoidal notch separates the two orbital plates; it is quadrilateral, and filled, in the articulated skull, by the cribriform plate of the ethmoid. ...
The lacrimal bone (Os Lacrimale), the smallest and most fragile bone of the face, is situated at the front part of the medial wall of the orbit. ...
Near the nasal part of the interior surface of the frontal bone is a depression, the trochlear fovea, or occasionally a small trochlear spine, for the attachment of the cartilaginous pulley of the Obliquus oculi superior. ...
...
The frontal air sinuses are lined by mucous membrane, and each communicates with the corresponding nasal cavity by means of a passage called the frontonasal duct. ...
The temporal bones (os temporales) are situated at the sides and base of the skull. ...
The squama of the temporal bone forms the anterior and upper part of the bone, and is scale-like, thin, and translucent. ...
The anterior root of the posterior end of the outer surface of the Squama temporalis, continuous with the lower border, is short but broad and strong; it is directed medialward and ends in a rounded eminence, the articular tubercle (eminentia articularis). ...
In the temporal bone, between the posterior wall of the external acoustic meatus and the posterior root of the zygomatic process is the area called the suprameatal triangle, or mastoid fossa, through which an instrument may be pushed into the tympanic antrum. ...
In the temporal bone, the mandibular fossa (glenoid fossa) is bounded, in front, by the articular tubercle; behind, by the tympanic part of the bone, which separates it from the external acoustic meatus; it is divided into two parts by a narrow slit, the petrotympanic fissure (Glaserian fissure). ...
The mandibular fossa is bounded, in front, by the articular tubercle; behind, by the tympanic part of the bone, which separates it from the external acoustic meatus; it is divided into two parts by a narrow slit, the petrotympanic fissure (Glaserian fissure). ...
The zygomatic process of the temporal bone is a long, arched process projecting from the lower part of the squamous portion of the temporal bone. ...
The outer surface of the temporal bone is perforated by numerous foramina; one of these, of large size, situated near the posterior border, is termed the mastoid foramen; it transmits a vein to the transverse sinus and a small branch of the occipital artery to the dura mater. ...
The mastoid process (or mastoid bone) is a conical bump of the posterior portion of the temporal bone that is situated behind the ear in humans and many other vertebrates and serves as a site of neck muscle attachment (the Sternocleidomastoid, Splenius capitis, and Longissimus capitis). ...
A section of the mastoid process shows it to be hollowed out into a number of spaces, the mastoid cells, which exhibit the greatest possible variety as to their size and number. ...
On the medial side of the mastoid process is a deep groove, the mastoid notch (digastric fossa), for the attachment of the Digastricus. ...
On the medial side of the mastoid process of the temporal bone is a deep groove, the mastoid notch (digastric fossa), for the attachment of the Digastricus; medial to this is a shallow furrow, the occipital groove, which lodges the occipital artery. ...
The inner surface of the mastoid portion of the temporal bone presents a deep, curved groove, the sigmoid sulcus, which lodges part of the transverse sinus; in it may be seen the opening of the mastoid foramen. ...
Mastoid antrum (or tympanic antrum) is a cavity in the petrous portion of the temporal bone, communicating posteriorly with the mastoid cells and anteriorly with the epitympanic recess of the middle ear via the aperture of the mastoid antrum. ...
On the interior surface of the temporal bone, behind the rough surface of the apex, is the large circular aperture of the carotid canal, which ascends at first vertically, and then, making a bend, runs horizontally forward and medialward; it transmits into the cranium the internal carotid artery, and the...
The facial canal is a canal running from the internal acoustic meatus to the stylomastoid foramen. ...
A shallow groove, sometimes double, leading lateralward and backward to an oblique opening, the hiatus of the facial canal, for the passage of the greater superficial petrosal nerve and the petrosal branch of the middle meningeal artery. ...
Near the center of the posterior surface of the temporal bone is a large orifice, the internal acoustic meatus (or internal auditory meatus), the size of which varies considerably; its margins are smooth and rounded, and it leads into a short canal, about 1 cm. ...
Medial to the opening for the carotid canal and close to its posterior border, in front of the jugular fossa, is a triangular depression; at the apex of this is a small opening, the aquaeductus cochleae (or cochlear aqueduct, or aqueduct of cochlea), which lodges a tubular prolongation of the...
Between the styloid and mastoid processes is the stylomastoid foramen; it is the termination of the facial canal, and transmits the facial nerve and stylomastoid artery. ...
In the temporal bone, above and between the aquæductus vestibuli is an irregular depression which lodges a process of the dura mater and transmits a small vein; in the infant this depression is represented by a large fossa, the subarcuate fossa, which extends backward as a blind tunnel under...
In the temporal bone, behind the openings for the carotid canal and the aquæductus cochleæ is a deep depression, the jugular fossa, of variable depth and size in different skulls; it lodges the bulb of the internal jugular vein. ...
In the bony ridge dividing the carotid canal from the jugular fossa is the small inferior tympanic canaliculus for the passage of the tympanic branch of the glossopharyngeal nerve. ...
In the lateral part of the jugular fossa of the temporal bone is the mastoid canaliculus for the entrance of the auricular branch of the vagus nerve. ...
The styloid process is pointed piece of bone that extends down from the human skull, just below the ear. ...
The Petrosquamous suture is a cranial suture between the petrous portion and the squama of the temporal bone. ...
(note: ossicles in petrous part, but not part of temporal bone) | | | | | | | | Sphenoid | | Surfaces | Superior surface: Sella turcica ( Dorsum sellae, Tuberculum sellae, Hypophysial fossa, Posterior clinoid processes) - Ethmoidal spine - Chiasmatic groove - Middle clinoid process - Petrosal process - Clivus Lateral surface: Carotid groove - Sphenoidal lingula The ossicles (also called auditory ossicles) are the three smallest bones in the human body. ...
The tympanic part of the temporal bone is a curved plate of bone lying below the squama and in front of the mastoid process. ...
The inner end of the external acoustic meatus is closed, in the recent state, by the tympanic membrane; the upper limit of its outer orifice is formed by the posterior root of the zygomatic process, immediately below which there is sometimes seen a small spine, the suprameatal spine, situated at...
The sphenoid bone (from Greek sphenoeides, wedgelike) is a bone situated at the base of the skull in front of the temporals and basilar part of the occipital bone. ...
The Sella turcica (literally Turkish saddle) is a saddle-shaped depression in the sphenoid bone at the base of the human skull. ...
In the sphenoid bone, the anterior boundary of the sella turcica is completed by two small eminences, one on either side, called the middle clinoid processes, while the posterior boundary is formed by a square-shaped plate of bone, the dorsum sellæ, ending at its superior angles in two tubercles...
In the sphenoid bone, the anterior boundary of the sella turcica is completed by two small eminences, one on either side, called the middle clinoid processes, while the posterior boundary is formed by a square-shaped plate of bone, the dorsum sellæ, ending at its superior angles in two tubercles...
The superior surface of the body of the sphenoid bone (Fig. ...
The superior surface of the body of the sphenoid bone is bounded behind by a ridge, which forms the anterior border of a narrow, transverse groove, the chiasmatic groove (optic groove, prechiasmatic sulcus), above and behind which lies the optic chiasma. ...
The anterior boundary of the sella turcica is completed by two small eminences, one on either side, called the middle clinoid processes. ...
On either side of the dorsum sellae of the sphenoid bone is a notch for the passage of the abducent nerve, and below the notch a sharp process, the petrosal process, which articulates with the apex of the petrous portion of the temporal bone, and forms the medial boundary of...
Behind the dorsum sellæ is a shallow depression, the clivus, which slopes obliquely backward, and is continuous with the groove on the basilar portion of the occipital bone; it supports the upper part of the pons. ...
Above the attachment of each great wing of the sphenoid bone is a broad groove, curved something like the italic letter f; it lodges the internal carotid artery and the cavernous sinus, and is named the carotid groove. ...
Along the posterior part of the lateral margin of the carotid groove of the sphenoid bone, in the angle between the body and great wing, is a ridge of bone, called the lingula. ...
Anterior surface: Sphenoidal sinuses | | | | | | | | | | | | | | | Other | | | | | Ethmoid | | | | Bones of head and neck: cranial sutures, fontanelles, and related regions | | | Cranial sutures | Cranial: Frontoethmoidal - Frontal or Metopic (Frontal/Frontal) - Coronal (Frontal/Parietal) - Occipitomastoid (Occipital/Temporal) - Lambdoid (Parietal/Temporal) - Sagittal (Parietal/Parietal) - Sphenoethmoidal - Sphenofrontal - Sphenoparietal - Sphenosquamosal (Sphenoid/Temporal) - Sphenopetrosal (Sphenoid/Temporal) - Squamosal (Temporal/Parietal) - Petrosquamous (Temporal/Temporal) Facial: Palatomaxillary suture The sphenoidal sinuses (or sphenoid) contained within the body of the sphenoid vary in size and shape; owing to the lateral displacement of the intervening septum they are rarely symmetrical. ...
The greater wing of the sphenoid bone, or ali-sphenoid, is a bony process of the sphenoid bone; there is one on each side, extending from the side of the body of the sphenoid and curving upward, laterally, and backwards. ...
At th anterior and medial part of the Sphenoid is a circular aperture, the foramen rotundum, for the transmission of the maxillary nerve. ...
At the base of the skull the foramen ovale is a hole that transmits the mandibular nerve, the otic ganglion, the accessory meningeal artery, emissary veins (from the cavernous sinus to the pterygoid plexus) and the lesser superficial petrosal nerve. ...
In the base of the skull, in the great wings of the sphenoid bone, medial to the foramen ovale, a small aperture, the sphenoidal emissary foramen, may occasionally be seen (it is often absent) opposite the root of the pterygoid process. ...
The foramen spinosum is the foramen in the skull that permits the passage of the middle meningeal artery. ...
The great wings, or ali-sphenoids, are two strong processes of bone, which arise from the sides of the body, and are curved upward, lateralward, and backward; the posterior part of each projects as a triangular process which fits into the angle between the squama and the petrous portion of...
The lateral surface of the great wing is convex, and divided by a transverse ridge, the infratemporal crest, into two portions. ...
The lesser wings of the sphenoid or orbito-sphenoids are two thin triangular plates, which arise from the upper and anterior parts of the body, and, projecting lateralward, end in sharp points [Fig. ...
1 Foramen ethmoidale, 2 Canalis opticus, 3 Fissura orbitalis superior, 4 Fossa sacci lacrimalis, 5 Sulcus infraorbitalis, 6 Fissura orbitalis inferior, 7 Foramen infraorbitale The superior orbital fissure is a foramen in the skull, although strictly it is more of a cleft, lying between the lesser and greater wings of...
In the sphenoid bone, the posterior border, smooth and rounded, is received into the lateral fissure of the brain; the medial end of this border forms the anterior clinoid process, which gives attachment to the tentorium cerebelli; it is sometimes joined to the middle clinoid process by a spicule of...
optical canal information ...
The pterygoid processes of the sphenoid, one on either side, descend perpendicularly from the regions where the body and great wings unite. ...
The Pterygoid fossa, or the sphenoid bone is wedged between several other bones in the front of the cranium. ...
In the pterygoid processes of the sphenoid, above the pterygoid fossa is a small, oval, shallow depression, the scaphoid fossa, which gives origin to the Tensor veli palatini. ...
The lateral pterygoid plate of the sphenoid (or lateral lamina of pterygoid process) is broad, thin, and everted; its lateral surface forms part of the medial wall of the infratemporal fossa, and gives attachment to the Pterygoideus externus; its medial surface forms part of the pterygoid fossa, and gives attachment...
The medial pterygoid plate of the sphenoid is narrower and longer than the lateral pterygoid plate; it curves lateralward at its lower extremity into a hook-like process, the pterygoid hamulus, around which the tendon of the Tensor veli palatini glides. ...
The pterygoid canal (also vidian canal) is a passage in the skull leading from just anterior to the foramen lacerum in the middle cranial fossa to the pterygopalatine fossa. ...
The medial pterygoid plate of the sphenoid curves lateralward at its lower extremity into a hook-like process, the pterygoid hamulus, around which the tendon of the Tensor veli palatini glides. ...
The body of the sphenoid bone, more or less cubical in shape, is hollowed out in its interior to form two large cavities, the sphenoidal air sinuses, which are separated from each other by a septum. ...
The sphenoidal conchae (sphenoidal turbinated processes) are two thin, curved plates, situated at the anterior and lower part of the body of the sphenoid. ...
Your skull is in your back (this is obviously not true, I was just testing the website to see if it really works) The ethmoid bone (os ethmoidale) is a bone in the skull that separates the nasal cavity from the brain. ...
The cribriform plate of the ethmoid bone (horizontal lamina) [Fig. ...
The crista galli (Latin: crest of the cock) is a median ridge of bone that projects from the cribriform plate of the ethmoid bone. ...
Bones and cartilages of septum of nose. ...
In the ethmoid bone, a curved lamina, the uncinate process, projects downward and backward from this part of the labyrinth; it forms a small part of the medial wall of the maxillary sinus, and articulates with the ethmoidal process of the inferior nasal concha. ...
The back part of the medial surface of the labyrinth of ethmoid is subdivided by a narrow oblique fissure, the superior meatus of the nose, bounded above by a thin, curved plate, the superior nasal concha. ...
The superior meatus, the smallest of the three meatuses of the nose, occupies the middle third of the lateral wall. ...
The medial surface of the labyrinth of ethmoid consists of a thin lamella, which descends from the under surface of the cribriform plate, and ends below in a free, convoluted margin, the middle nasal concha. ...
The middle meatus is situated between the middle and inferior conchæ, and extends from the anterior to the posterior end of the latter. ...
The Labyrinth or Lateral Mass of the ethmoid bone consists of a number of thin-walled cellular cavities, the ethmoidal cells, arranged in three groups, anterior, middle, and posterior, and interposed between two vertical plates of bone; the lateral plate forms part of the orbit, the medial, part of the...
ethmoidal sinuses can be divided into 3: a) anterior b) middle c) posterior except the posterior ethmoidal sinus, all the ethmoidal sinuses will drain into middle meateus. ...
Lateral to either olfactory groove are the internal openings of the anterior and posterior ethmoidal foramina (or canals). ...
Lateral to either olfactory groove are the internal openings of the anterior and posterior ethmoidal foramina (or canals). ...
This article is about the skeletal organs. ...
An MRI scan of the head. ...
Side view of the skull. ...
In human anatomy, a fontanelle (or fontanel) is one of two soft spots on a newborn humans skull. ...
Side view of the skull. ...
The frontoethmoidal suture is the suture between the ethmoid bone and the frontal bone. ...
The frontal suture (sutura frontalis) is a dense connective tissue structure that divides the two halves of the frontal bone of the skull in infants and children. ...
The coronal suture (sutura coronalis) is a dense, fibrous connective tissue joint that separates the frontal and parietal bones of the skull. ...
The occipitomastoid suture is the cranial suture between the occipital bone and the mastoid portion of the temporal bone. ...
The lambdoid suture (sutura lambdoidea) is a dense, fibrous connective tissue joint that separates the parietal and temporal bones of the skull from the occipital bone. ...
The sagittal suture (sutura sagittalis) is a dense, fibrous connective tissue joint between the two parietal bones of the skull. ...
The Sphenoethmoidal suture is the cranial suture between the sphenoid bone and the ethmoid bone. ...
The Sphenofrontal suture is the cranial suture between the sphenoid bone and the frontal bone. ...
The Sphenoparietal suture is the cranial suture between the sphenoid bone and the parietal bone. ...
The Sphenosquamosal suture is a cranial suture between the sphenoid bone and the squama of the temporal bone. ...
The Sphenopetrosal suture is the cranial suture between the sphenoid bone and the petrous portion of the temporal bone. ...
The squamosal suture arches backward from the pterion and connects the temporal squama with the lower border of the parietal: this suture is continuous behind with the short, nearly horizontal parietomastoid suture, which unites the mastoid process of the temporal with the region of the mastoid angle of the parietal. ...
The Petrosquamous suture is a cranial suture between the petrous portion and the squama of the temporal bone. ...
Cranial-facial: Sphenozygomatic - Zygomaticotemporal - Zygomaticofrontal | | | Fontanelles | | | | Foramina of multiple bones | | | | Fossae | | | | Other compound structures | Cranial: Asterion - Pterion - Calvaria - Stephanion - Bregma - Lambda Facial: Nasion The Sphenozygomatic suture is the cranial suture between the sphenoid bone and the zygomatic bone. ...
The Zygomaticotemporal suture (or Temporozygomatic suture) is the cranial suture between the zygomatic bone and the temporal bone. ...
The Zygomaticofrontal suture (or Frontozygomatic suture) is the cranial suture between the zygomatic bone and the frontal bone. ...
In human anatomy, a fontanelle (or fontanel) is one of two soft spots on a newborn humans skull. ...
The anterior fontanelle (bregmatic fontanelle, frontal fontanelle) is the largest, and is placed at the junction of the sagittal suture, coronal suture, and frontal suture; it is lozenge-shaped, and measures about 4 cm. ...
The posterior fontanelle (or occipital fontanelle) is triangular in form and is situated at the junction of the sagittal suture and lambdoidal suture. ...
The following is a list of holes, or foramina, in the base of the skull and what goes through each of them. ...
The lateral wall and the floor of the orbit are separated posteriorly by the inferior orbital fissure which transmits the maxillary nerve and its zygomatic branch, the infraorbital vessels, and the ascending branches from the sphenopalatine ganglion. ...
The foramen lacerum (Latin for lacerated piercing) is a triangular hole in the base of the skull located at the base of the medial pterygoid plate. ...
The jugular foramen, a large aperture in the base of the skull. ...
The canal containing the nasolacrimal duct is called the nasolacrimal canal. ...
The floor of the anterior fossa is formed by the orbital plates of the frontal, the cribriform plate of the ethmoid, and the small wings and front part of the body of the sphenoid; it is limited behind by the posterior borders of the small wings of the sphenoid and...
The middle fossa, deeper than the anterior cranial fossa, is narrow in the middle, and wide at the sides of the skull. ...
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The cranial cavity, or intracranial space, is the space formed inside the skull. ...
For other uses, see Asterion (disambiguation) In human anatomy, the asterion is a visible, so-called craniometric, point on the exposed skull, just behind the ear, where three cranial sutures meet: the lambdoid, parieto-mastoid, and occipito-mastoid sutures. ...
The point corresponding with the posterior end of the sphenoparietal suture is named the pterion; it is situated about 3 cm. ...
The calvaria (or calva, or skullcap) is the roof of the skull. ...
The point where the upper temporal line cuts the coronal suture is named the stephanion. ...
The parietal bones are bones in the human skull and form, by their union, the sides and roof of the cranium. ...
The nasion (nay-zhun) is the intersection of the frontal and two nasal bones of the human skull. ...
Cranial-facial: Dacryon - Zygomatic arch - Temporal fossa - Infratemporal fossa - Pterygomaxillary fissure - Pterygopalatine fossa | | | Bones of upper limbs | | | Pectoral girdle, clavicle | | | | Scapula | fossae ( subscapular, supraspinatous, infraspinatous) - suprascapular notch - glenoid cavity tubercles (infraglenoid, supraglenoid) - spine of scapula - acromion - coracoid process The point of junction of the maxillary bone, lacrimal bone, and frontal bone is named the dacryon. ...
The zygomatic bone (also known as the zygoma; Os Zygomaticum; Malar Bone) is a paired bone of the human skull. ...
The introduction to this article provides insufficient context for those unfamiliar with the subject matter. ...
The infratemporal fossa is an irregularly shaped cavity, situated below and medial to the zygomatic arch. ...
The pterygomaxillary fissure is vertical, and descends at right angles from the medial end of the inferior orbital fissure; it is a triangular interval, formed by the divergence of the maxilla from the pterygoid process of the sphenoid. ...
In the skull, the pterygopalatine fossa is the space between the lateral pterygoid plate (which is part of the sphenoid bone), and the palate. ...
This article is about the skeletal organs. ...
In humans, the upper limb is an anatomical term for the limb that is attached to the pectoral girdle. ...
The pectoral girdle is the set of bones which connect the upper limb to the axial skeleton on each side. ...
Collarbone and collar bone redirect here. ...
At the posterior border of the scapula, near the point where the prismatic joins with the flattened portion, is a rough eminence, the conoid tubercle (or coracoid tuberosity); this, in the natural position of the bone, surmounts the coracoid process of the scapula, and gives attachment to the conoid ligament. ...
From the coracoid tuberosity an oblique ridge, the trapezoid line (or trapezoid ridge, or oblique), runs forward and lateralward, and afford attachment to the trapezoid ligament. ...
On the medial part of the clavicle is a broad rough surface, the costal tuberosity (impression for costoclavicular ligament), rather more than 2 cm. ...
On the medial part of the clavicle is a broad rough surface, the costal tuberosity (rhomboid impression), rather more than 2 cm. ...
Left scapula - front view () Left scapula - rear view () In anatomy, the scapula, or shoulder blade, is the bone that connects the humerus (arm bone) with the clavicle (collar bone). ...
Left scapula - front view () Left scapula - rear view () In anatomy, the scapula, or shoulder blade, is the bone that connects the humerus (arm bone) with the clavicle (collar bone). ...
The supraspinatous fossa (supraspinatus fossa, supraspinous fossa) of the scapula, smaller than the infraspinatous fossa, is concave, smooth, and broader at its vertebral than at its humeral end; its medial two-thirds give origin to the Supraspinatus. ...
The infraspinatous fossa (infraspinatus fossa, infraspinous fossa) of the scapula is much larger than the supraspinatous fossa; toward its vertebral margin a shallow concavity is seen at its upper part; its center presents a prominent convexity, while near the axillary border is a deep groove which runs from the upper...
The suprascapular notch (or scapular notch) is a notch in the lateral part of the upper border of the scapula, just next to the base of the coracoid process. ...
Glenoid fossa redirects here, for the other use of Glenoid fossa please see mandibular fossa. ...
The infraglenoid tubercle is the part of the scapula to which the long head of the triceps brachii attaches. ...
The supraglenoid tubercle is a region of the scapula to which the long head of the biceps brachii muscle attaches. ...
The spine of the scapula is a prominent plate of bone, which crosses obliquely the medial four-fifths of the dorsal surface of the scapula at its upper part, and separates the supra- from the infraspinatous fossa. ...
The acromion process, or simply the acromion, is an anatomical feature on the scapula. ...
In human beings, the coracoid process is a small hook-like structure that comes off the scapula to point forward. ...
borders ( superior, lateral/axillary, medial/vertebral) - angles ( superior, inferior, lateral) | | | Humerus | upper extremity: necks ( anatomical, surgical) - tubercles ( greater, lesser) - intertubercular sulcus body: radial sulcus - deltoid tuberosity Of the three borders of the scapula, the superior border (or superior margin) is the shortest and thinnest; it is concave, and extends from the medial angle to the base of the coracoid process. ...
The lateral border (or axillary border, or margin) is the thickest of the three borders of the scapula. ...
The medial border of the scapula (vertebral border, medial margin) is the longest of the three borders, and extends from the medial to the inferior angle. ...
The superior angle of the scapula (or medial angle), formed by the junction of the superior and vertebral borders, is thin, smooth, rounded, inclined somewhat lateralward, and gives attachment to a few fibers of the Levator scapulae. ...
The inferior angle of the scapula, thick and rough, is formed by the union of the vertebral and axillary borders; its dorsal surface affords attachment to the Teres major and frequently to a few fibers of the Latissimus dorsi. ...
The lateral angle of the scapula (head of the scapula, acromial angle) is the thickest part of the bone. ...
The humerus is a long bone in the arm or fore-legs (animals) that runs from the shoulder to the elbow. ...
The upper extremity of the humerus (proximal humerus) consists of a large rounded head joined to the body by a constricted portion called the neck, and two eminences, the greater and lesser tubercles. ...
The anatomical neck of the humerus is obliquely directed, forming an obtuse angle with the body. ...
The surgical neck of the humerus is a constriction below the tubercles of the greater tubercle and lesser tubercle. ...
The greater tubercle is situated lateral to the head and lesser tubercle. ...
The lesser tubercle, although smaller, is more prominent than the greater tubercle: it is situated in front, and is directed medialward and forward. ...
The tubercles of the humerus are separated from each other by a deep groove, the intertubercular groove (bicipital groove, sulcus intertubercular), which lodges the long tendon of the Biceps brachii and transmits a branch of the anterior humeral circumflex artery to the shoulder-joint. ...
The body or shaft of the humerus is almost cylindrical in the upper half of its extent, prismatic and flattened below, and has three borders and three surfaces. ...
The center of the lateral border of the humerus is traversed by a broad but shallow oblique depression, the radial sulcus (musculospiral groove, radial groove, spiral groove). ...
The deltoid tuberosity is the region on the shaft of the humerus to which the the deltoid muscle attaches. ...
lower extremity: capitulum - trochlea - epicondyles ( lateral, medial) - supracondylar ridges ( lateral, medial) - fossae ( radial, coronoid, olecranon) | | | Forearm | | | | Hand | carpus: scaphoid - lunate - triquetral - pisiform - trapezium - trapezoid - capitate - hamate ( hamulus) metacarpus: 1st metacarpal - 2nd - 3rd - 4th - 5th The lower extremity of the humerus is flattened from before backward, and curved slightly forward; it ends below in a broad, articular surface, which is divided into two parts by a slight ridge. ...
The lateral portion of the articular surface of the humerus consists of a smooth, rounded eminence, named the capitulum of the humerus; it articulates with the cupshaped depression on the head of the radius, and is limited to the front and lower part of the bone. ...
The medial portion of the articular surface of the humerus is named the trochlea, and presents a deep depression between two well-marked borders; it is convex from before backward, concave from side to side, and occupies the anterior, lower, and posterior parts of the extremity. ...
The lateral epicondyle of the humerus is a small, tuberculated eminence, curved a little forward, and giving attachment to the radial collateral ligament of the elbow-joint, and to a tendon common to the origin of the Supinator and some of the Extensor muscles. ...
The medial epicondyle of the humerus, larger and more prominent than the lateral epicondyle, is directed a little backward. ...
The lower part of the lateral border of the body of the humerus forms a prominent, rough margin, a little curved from behind forward, the lateral supracondylar ridge (or line), which presents an anterior lip for the origin of the Brachioradialis above, and Extensor carpi radialis longus below, a posterior...
The inferior third of the medial border of the humerus is raised into a slight ridge, the medial supracondylar ridge (or medial supracondylar line), which becomes very prominent below; it presents an anterior lip for the origins of the Brachialis and Pronator teres, a posterior lip for the medial head...
Above the front part of the capitulum is a slight depression, the radial fossa, which receives the anterior border of the head of the radius, when the forearm is flexed. ...
Above the front part of the trochlea is a small depression, the coronoid fossa, which receives the coronoid process of the ulna during flexion of the forearm. ...
Above the back part of the trochlea of the humerus is a deep triangular depression, the olecranon fossa, in which the summit of the olecranon is received in extension of the forearm. ...
// The Human Forearm The forearm is the structure on the upper limb, between the elbow and the wrist. ...
The radius is the bone of the forearm that extends from the outside of your limb to your phlangx (lateral) of the elbow to the thumb side of the wrist. ...
The upper extremity of the radius (or proximal extremity) presents a head, neck, and tuberosity. ...
Beneath the neck of the radius, on the medial side, is an eminence, the radial tuberosity; its surface is divided into: a posterior, rough portion, for the insertion of the tendon of the biceps brachii. ...
The body of the radius (or shaft of radius) is prismoid in form, narrower above than below, and slightly curved, so as to be convex lateralward. ...
The lower extremity of the radius is large, of quadrilateral form, and provided with two articular surfaces - one below, for the carpus, and another at the medial side, for the ulna. ...
The articular surface for the ulna is called the ulnar notch (sigmoid cavity) of the radius; it is narrow, concave, smooth, and articulates with the head of the ulna. ...
The lateral surface of the radius is prolonged obliquely downward into a strong, conical projection, the styloid process, which gives attachment by its base to the tendon of the Brachioradialis, and by its apex to the radial collateral ligament of the wrist-joint. ...
The ulna (Elbow Bone) [Figs. ...
The upper extremity of the ulna (or proximal extremity) presents two curved processes, the olecranon and the coronoid process; and two concave, articular cavities, the semilunar and radial notches. ...
At the junction of the antero-inferior surface of the coronoid process with the front of the body is a rough eminence, the tuberosity of the ulna (or ulnar tuberosity), which gives insertion to a part of the Brachialis; to the lateral border of this tuberosity the oblique cord is...
...
The coronoid process is a triangular eminence projecting forward from the upper and front part of the ulna. ...
The radial notch of the ulna (lesser sigmoid cavity) is a narrow, oblong, articular depression on the lateral side of the coronoid process; it receives the circumferential articular surface of the head of the radius. ...
The body of the ulna at its upper part is prismatic in form, and curved so as to be convex behind and lateralward; its central part is straight; its lower part is rounded, smooth, and bent a little lateralward. ...
The lower extremity of the ulna (or distal extremity) is small, and presents two eminences; the lateral and larger is a rounded, articular eminence, termed the head of the ulna; the medial, narrower and more projecting, is a non-articular eminence, the styloid process. ...
The styloid process of the ulna projects from the medial and back part of the bone; it descends a little lower than the head, and its rounded end affords attachment to the ulnar collateral ligament of the wrist-joint. ...
For other uses, see Hand (disambiguation). ...
This article is about Carpal bones. ...
The scaphoid bone (hand navicular) of the wrist is found on the thumb side of the hand, within the anatomical snuffbox. ...
The lunate bone (os lunatum; semilunar bone) is a bone in the human hand that may be distinguished by its deep concavity and crescentic outline. ...
The triquetral bone (also called triquetral, os triquetrum, cuneiform bone, pyramidal bone, cubital bone, os pyramidale, os triangulare, three-cornered bone, and triangular bone) is a type of carpal bone. ...
The left pisiform bone. ...
The trapezium is a bone in the human hand. ...
In human anatomy, the trapezoid bone (lesser multangular bone; os multangulum minus) is a bone in the hands. ...
The capitate bone (os capitatum; os magnum) is a bone in the human hand. ...
The hamate bone (os hamatum; unciform bone) is a bone in the human hand that may be readily distinguished by its wedge-shaped form, and the hook-like process which projects from its volar surface. ...
The volar surface of the hamate bone presents, at its lower and ulnar side, a curved, hook-like process, the hamulus, directed forward and lateralward. ...
The metacarpus is the intermediate part of the hand skeleton that is located between the fingers distally and the carpus which forms the connection to the forearm. ...
The first metacarpal bone (metacarpal bone of the thumb) which connects to the thumb is shorter and stouter than the others, diverges to a greater degree from the carpus, and its volar surface is directed toward the palm. ...
The second metacarpal bone (metacarpal bone of the index finger) is the longest, and its base the largest, after the first metacarpal. ...
The third metacarpal bone (metacarpal bone of the middle finger) is a little smaller than the second. ...
The fourth metacarpal bone (metacarpal bone of the ring finger) is shorter and smaller than the third. ...
The fifth metacarpal bone (metacarpal bone of the little finger) presents on its base one facet on its superior surface, which is concavo-convex and articulates with the hamate, and one on its radial side, which articulates with the fourth metacarpal. ...
phalanges of the hand: proximal - intermediate - distal | | | Bones of torso | | | Sternum | | | | Rib | specific ribs ( 1, 2, 9, 10, 11, 12, false - 8-12, floating - 11-12) - parts ( Angle, Tubercle, Costal groove, Neck, Head) | | | General vertebral structures | | | | Cervical vertebrae | C1 ( anterior arch, posterior arch, lateral mass), C2 ( dens), C3, C4, C5, C6, C7 anterior tubercle, posterior tubercle, foramen transversarium | | | Thoracic vertebrae | T1, T2, T3, T4, T5, T6, T7, T8, T9, T10, T11, T12 costal facets ( superior, inferior, transverse) | | | Lumbar vertebrae | | | | Sacrum | | | | Bones of pelvis/pelvic cavity | | | General | | | | Ilium | | | | Ischium | | | | Pubis | | | | Compound | Acetabulum ( Acetabular notch) - Iliopubic eminence/Iliopectineal line - Linea terminalis - Ischiopubic ramus/ Pubic arch Obturator foramen - Greater sciatic foramen/Greater sciatic notch - Lesser sciatic foramen The Phalanges of the hand are fourteen in number, three for each finger, and two for the thumb. ...
Proximal phalanges are bones found in the limbs of most vertebrates. ...
Intermediate phalanges are bones found in the limbs of most vertebrates. ...
Distal phalanges are bones found in the limbs of most vertebrate skeletons. ...
This article is about the skeletal organs. ...
The human torso Torso is an anatomical term for the greater part of the human body without the head and limbs. ...
The sternum (from Greek ÏÏÎÏνον, sternon, chest) or breastbone is a long, flat bone located in the center of the thorax (chest). ...
The suprasternal notch (fossa jugularis sternalis), also known as the jugular notch, is part of human anatomy. ...
Sternum or breastbone is a long, flat bone located in the center of the thorax (chest). ...
The sternal angle is the angle formed by the junction of the manubrium and the body of the sternum. ...
The body of the sternum (gladiolus), considerably lengthier, narrower, and thinner than the manubrium, attains its greatest breadth close to the lower end. ...
The xiphisternal joint (or xiphisternal synchondrosis) is a location near the bottom of the sternum, where the following two parts of the sternum meet: body of the sternum xiphoid process It is in line with the T9 vertebrae. ...
The xiphoid process is a small cartilaginous extension to the lower part of the sternum which is usually ossified in the adult human. ...
The human rib cage is a part of the human skeleton within the thoracic area. ...
The first rib is the most curved and usually the shortest of all the ribs; it is broad and flat, its surfaces looking upward and downward, and its borders inward and outward. ...
The second rib is much longer than the first, but has a very similar curvature. ...
The tenth rib has only a single articular facet on its head. ...
The eleventh rib has a single articular facet on the head, which is of rather large size. ...
The twelfth rib has a single articular facet on the head, which is of rather large size. ...
Excluding the first seven ribs, the remaining five are false ribs. ...
the four floating ribs Four of the ribs (two pairs) in the ribcage are said to be floating ribs because they are attached to the vertebrae only, and not to the sternum or cartilage coming off of the sternum. ...
The external surface of the rib is convex, smooth, and marked, a little in front of the tubercle, by a prominent line, directed downward and laterally; this gives attachment to a tendon of the Iliocostalis, and is called the angle. ...
On the posterior surface at the junction of the neck and body of the rib, and nearer the lower than the upper border, is an eminenceâthe tubercle It consists of an articular and a non-articular portion. ...
Between the ridge of the interal surface of the rib and the inferior border is a groove, the costal groove, for the intercostal vessels and intercostal nerve. ...
The neck of the rib is the flattened portion which extends lateralward from the head; it is about 2. ...
The head of the rib is marked by a kidney-shaped articular surface, divided by a horizontal crest into two facets for articulation with the depression formed on the bodies of two adjacent thoracic vertebrae; the upper facet is the smaller; to the crest is attached the interarticular ligament. ...
The body is the largest part of a vertebra, and is more or less cylindrical in shape. ...
The vertebral arch (or neural arch) is the posterior part of a vertebra. ...
The pedicles are two short, thick processes, which project backward, one on either side, from the upper part of the body, at the junction of its posterior and lateral surfaces. ...
The laminæ are two broad plates directed backward and medialward from the pedicles. ...
The concavities above and below the pedicles are named the vertebral notches; and when the vertebrae are articulated, the notches of each contiguous pair of bones form the intervertebral foramina. ...
In a typical vertebra, the vertebral foramen is the foramen formed by the anterior segment (the body), and the posterior part, the vertebral arch. ...
When the spinal vertebrae are articulated with each other the bodies form a strong pillar for the support of the head and trunk, and the vertebral foraminae constitute a canal for the protection of the medulla spinalis (spinal cord). ...
The transverse processes of a vertebra, two in number, project one at either side from the point where the lamina joins the pedicle, between the superior and inferior articular processes. ...
The articular processes of a vertebra, two superior and two inferior, spring from the junctions of the pedicles and laminæ. The superior project upward, and their articular surfaces are directed more or less backward; the inferior project downward, and their surfaces look more or less forward. ...
A zygapophysis is process which sticks out of an end of a vertebra to lock with a zygapophysis on the next vertebra, to make the backbone more stable. ...
A diagram of a thoracic vertebra. ...
In vertebrates, cervical vertebrae (singular: vertebra) are those vertebrae immediately behind (caudal to) the skull. ...
In anatomy, the atlas (C1) is the topmost (first) cervical vertebra of the spine. ...
The anterior arch of the atlas forms about one-fifth of the ring of the atlas: its anterior surface is convex, and presents at its center the anterior tubercle for the attachment of the Longus colli muscles; posteriorly it is concave, and marked by a smooth, oval or circular facet...
In a cervical vertebra, the posterior arch forms about two-fifths of the circumference of the ring: it ends behind in the posterior tubercle, which is the rudiment of a spinous process and gives origin to the Recti capitis posteriores minores. ...
The lateral masses are the most bulky and solid parts of the atlas, in order to support the weight of the head. ...
In anatomy, the second cervical vertebra (C2) of the spine is named the axis or epistropheus. ...
The dens or odontoid process or odontoid peg of the axis exhibits a slight constriction or neck, where it joins the body. ...
The most distinctive characteristic of the seventh cervical vertebra is the existence of a long and prominent spinous process, hence the name vertebra prominens. ...
The anterior arch forms about one-fifth of the ring: its anterior surface is convex, and presents at its center the anterior tubercle for the attachment of the Longus colli muscles. ...
The posterior arch of a cervical vertebra forms about two-fifths of the circumference of the ring: it ends behind in the posterior tubercle, which is the rudiment of a spinous process and gives origin to the Recti capitis posteriores minores. ...
The transverse processes of the cervical vertebrae are each pierced by the foramen transversarium, which, in the upper six vertebræ, gives passage to the vertebral artery and vein and a plexus of sympathetic nerves. ...
A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ...
A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ...
A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ...
A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ...
A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ...
A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ...
A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ...
A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ...
A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ...
A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ...
A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ...
A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ...
A typical thoracic vertebra The thoracic vertebrae (vertebrae thoracales) compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. ...
The superior costal facet (or superior costal fovea) is a site where a rib forms a joint with the top of a vertebra. ...
The inferior costal facet (or inferior costal fovea) is a site where a rib forms a joint with the bottom of a vertebra. ...
The transverse costal facet (or transverse costal fovea) is a site where a rib forms a joint with the transverse process of a vertebra. ...
The lumbar vertebrae are the largest segments of the movable part of the vertebral column, and are characterized by the absence of the foramen transversarium within the transverse process, and by the absence of facets on the sides of the body. ...
Of the tubercles noticed in connection with the transverse processes of the lower thoracic vertebrae, the inferior is situated at the back part of the base of the transverse process, and is called the accessory process. ...
Of the three tubercles noticed in connection with the transverse processes of the lower thoracic vertebrae, the superior one is connected in the lumbar region with the back part of the superior articular process, and is named the mammillary process. ...
The lumbar vertebrae are the largest segments of the movable part of the vertebral column, and are characterized by the absence of the foramen transversarium within the transverse process, and by the absence of facets on the sides of the body. ...
For the record label, see Sacrum Torch. ...
The pelvic surface of sacrum is concave from above downward, and slightly so from side to side. ...
At the ends of the transverse ridges of the pelvic surface of the sacrum are seen the anterior sacral foramina (or pelvic sacral foramina), four in number on either side, somewhat rounded in form, diminishing in size from above downward, and directed lateralward and forward; they give exit to the...
The dorsal surface of sacrum is convex and narrower than the pelvic. ...
Lateral to the articular processes of the sacrum are the four posterior sacral foramina (or dorsal sacral foramina); they are smaller in size and less regular in form than the anterior, and transmit the posterior divisions of the sacral nerves. ...
In the middle line of the dorsal surface of the sacrum, it displays a crest, the median sacral crest, surmounted by three or four tubercles, the rudimentary spinous processes of the upper three or four sacral vertebrae. ...
On the lateral aspect of the sacral groove is a linear series of tubercles produced by the fusion of the articular processes which together form the indistinct medial sacral crest (intermediate sacral crest, sacral articular crest). ...
On the lateral side of the posterior sacral foramina is a series of tubercles, which represent the transverse processes of the sacral vertebrae, and form the lateral sacral crest. ...
The lateral surface of sacrum is broad above, but narrowed into a thin edge below. ...
On the lateral surface of sacrum there is a rough surface, the sacral tuberosity, on which are three deep and uneven impressions, for the attachment of the posterior sacroiliac ligament. ...
The base of the sacrum, which is broad and expanded, is directed upward and forward. ...
The laminae of the fifth sacral vertebra, and sometimes those of the fourth, fail to meet behind, and thus a sacral hiatus or deficiency occurs in the posterior wall of the sacral canal. ...
In human anatomy, the presacral space is behind the rectum and in front of the coccyx. ...
The Sacral promontory is the anatomical term for the anteriormost portion of the sacrum. ...
The vertebral canal (sacral canal) runs throughout the greater part of the sacral bone; above, it is triangular in form; below, its posterior wall is incomplete, from the non-development of the laminæ and spinous processes. ...
On either side of the body of the base of the sacrum is a large triangular surface, which supports the Psoas major and the lumbosacral trunk, and in the articulated pelvis is continuous with the iliac fossa. ...
The sacrum is curved upon itself and placed very obliquely, its base projecting forward and forming the prominent sacrovertebral angle when articulated with the last lumbar vertebra. ...
This article is about the skeletal organs. ...
In common usage, a human leg is the lower limb of the body, extending from the hip to the ankle, and including the thigh, the knee, and the cnemis. ...
The femur or thigh bone is the longest, most voluminous, and strongest bone of the mammalian bodies. ...
The femur head which is globular and forms rather more than a hemisphere, is directed upward, medialward, and a little forward, the greater part of its convexity being above and in front. ...
The femur neck is a flattened pyramidal process of bone, connecting the head with the body, and forming with the latter a wide angle opening medialward. ...
Bones of the Hip In anatomy, the hip is the bony projection of the femur, known as the greater trochanter, and the overlying muscle and fat. ...
The medial surface of the Upper extremity of femur, of much less extent than the lateral, presents at its base a deep depression, the trochanteric fossa (digital fossa), for the insertion of the tendon of the Obturator externus, and above and in front of this an impression for the insertion...
The Lesser Trochanter (small trochanter) of the femur is a conical eminence, which varies in size in different subjects; it projects from the lower and back part of the base of the neck. ...
Running obliquely downward and medialward from the tubercle of the femur is the intertrochanteric line (spiral line of the femur); it winds around the medial side of the body of the bone, below the lesser trochanter, and ends about 5 cm. ...
Running obliquely downward and medialward from the summit of the greater trochanter on the posterior surface of the neck is a prominent ridge, the intertrochanteric crest. ...
The body of the femur (or shaft), almost cylindrical in form, is a little broader above than in the center, broadest and somewhat flattened from before backward below. ...
The linea aspera is a ridge of roughened surface on the posterior aspect of the femur, to which are attached muscles and intermusclular septa. ...
The linea aspera is a ridge of roughened surface on the posterior aspect of the femur, to which are attached muscles and intermusclular septa. ...
The upper part of the gluteal tuberosity is often elongated into a roughened crest, on which a more or less well-marked, rounded tubercle, the third trochanter, is occasionally developed. ...
On the posterior surface of the femur, the intermediate ridge or pectineal line is continued to the base of the lesser trochanter and gives attachment to the pectineus muscle. ...
The lower extremity of the femur (or distal extremity), larger than the upper extremity of femur, is somewhat cuboid in form, but its transverse diameter is greater than its antero-posterior; it consists of two oblong eminences known as the condyles. ...
The medial lip of the linea aspera ends below at the summit of the medial condyle, in a small tubercle, the adductor tubercle, which affords insertion to the tendon of the Adductor magnus. ...
The lateral epicondyle of the femur, smaller and less prominent than the medial epicondyle, gives attachment to the fibular collateral ligament of the knee-joint. ...
The medial epicondyle of the femur is a large convex eminence to which the tibial collateral ligament of the knee-joint is attached. ...
The lateral condyle is one of the two projections on the lower extremity of femur. ...
The medial condyle is one of the two projections on the lower extremity of femur. ...
The articular surface of the lower end of the femur occupies the anterior, inferior, and posterior surfaces of the condyles. ...
This article is about the vertebrate bone. ...
The upper extremity of the tibia (or proximal extremity) is large, and expanded into two eminences, the medial condyle and lateral condyle. ...
Posteriorly, the medial condyle and lateral condyle are separated from each other by a shallow depression, the posterior intercondyloid fossa (or intercondylar area), which gives attachment to part of the posterior cruciate ligament of the knee-joint. ...
The anterior intercondyloid fossa (or intercondylar area) is the location where the anterior cruciate ligament attaches to the tibia. ...
The lateral condyle is the lateral portion of the upper extremity of tibia. ...
The medial condyle is the medial portion of the upper extremity of tibia. ...
The body of the tibia has three borders and three surfaces. ...
Narrow below where the anterior surfaces of the condyles of the tibia end in a large oblong elevation, the tuberosity of the tibia, which gives attachment to the ligamentum patellae. ...
The posterior surface of the tibia presents, at its upper part, a prominent ridge, the soleal line (popliteal line in older texts), which extends obliquely downward from the back part of the articular facet for the fibula to the medial border, at the junction of its upper and middle thirds. ...
The lower extremity of the tibia, much smaller than the upper extremity of tibia, presents five surfaces; it is prolonged downward on its medial side as a strong process, the medial malleolus. ...
We dont have an article called Medial malleolus Start this article Search for Medial malleolus in. ...
For other uses see fibula (disambiguation) The fibula or calf bone is a bone placed on the lateral side of the tibia, with which it is connected above and below. ...
The upper extremity or head of the fibula is of an irregular quadrate form, presenting above a flattened articular surface, directed upward, forward, and medialward, for articulation with a corresponding surface on the lateral condyle of the tibia. ...
The body of fibula presents four borders - the antero-lateral, the antero-medial, the postero-lateral, and the postero-medial; and four surfaces - anterior, posterior, medial, and lateral. ...
The lower extremity (distal extremity; external malleolus) of the fibula is of a pyramidal form, and somewhat flattened from side to side; it descends to a lower level than the medial malleolus. ...
FIG. 268â Bones of the right foot. ...
The calcaneus is the large bone making up the heel of the human foot. ...
At the upper and forepart of the medial surface of the calcaneus is a horizontal eminence, the sustentaculum tali, which gives attachment to a slip of the tendon of the Tibialis posterior. ...
The two oblique grooves of the lateral surface of the calcaneus are separated by an elevated ridge, or tubercle, the trochlear process (peroneal tubercle, or fibular trochlea of calcaneus), which varies much in size in different bones. ...
See talus for other meanings of the word The talus bone or astragalus of the ankle joint connects the leg to the foot. ...
The navicular bone occurs in human and horse anatomy. ...
The cuboid bone is one of seven Tarsal bones. ...
There are three cuneiform bones in the human foot: the medial cuneiform, the intermediate cuneiform and the lateral cuneiform. ...
There are three cuneiform bones in the human foot: the medial cuneiform, the intermediate cuneiform and the lateral cuneiform. ...
There are three cuneiform bones in the human foot: the medial cuneiform, the intermediate cuneiform and the lateral cuneiform. ...
There are three cuneiform bones in the human foot: the medial cuneiform, the intermediate cuneiform and the lateral cuneiform. ...
The metatarsus consists of the five long bones of the foot, which are numbered from the medial side (ossa metatarsalia I.-V.); each presents for examination a body and two extremities. ...
The first metatarsal bone is remarkable for its great thickness, and is the shortest of the metatarsal bones. ...
The second metatarsal bone is the longest of the metatarsal bones, being prolonged backward into the recess formed by the three cuneiform bones. ...
The third metatarsal bone articulates proximally, by means of a triangular smooth surface, with the third cuneiform; medially, by two facets, with the second metatarsal; and laterally, by a single facet, with the fourth metatarsal. ...
The fourth metatarsal bone is smaller in size than the third; its base presents an oblique quadrilateral surface for articulation with the cuboid; a smooth facet on the medial side, divided by a ridge into an anterior portion for articulation with the third metatarsal, and a posterior portion for articulation...
The fifth metatarsal bone is recognized by a rough eminence, the tuberosity, on the lateral side of its base. ...
For other uses, see Patella (disambiguation). ...
The phalanges of the foot correspond, in number and general arrangement, with those of the hand; there are two in the great toe, and three in each of the other toes. ...
This article is about the skeletal organs. ...
The pelvis (pl. ...
The Pelvic cavity is a body cavity that is bounded by the bones of the pelvis and which primarily contains reproductive organs. ...
For the record label, see Sacrum Torch. ...
The coccyx is formed of up to five vertebrae. ...
The hip bone (or innominate bone) is a large, flattened, irregularly shaped bone, constricted in the center and expanded above and below. ...
The ilium of the pelvis is divisible into two parts, the body and the ala; the separation is indicated on the internal surface by a curved line, the arcuate line, and on the external surface by the margin of the acetabulum. ...
For other arcuate lines, see arcuate line. ...
The wing of ilium (or ala) is the large expanded portion which bounds the greater pelvis laterally. ...
The posterior gluteal line (superior curved line), the shortest of the three gluteal lines, begins at the crest, about 5 cm. ...
The anterior gluteal line (middle curved line), the longest of the three gluteal lines, begins at the crest, about 4 cm. ...
The inferior gluteal line (inferior curved line), the least distinct of the three gluteal lines, begins in front at the notch on the anterior border, and, curving backward and downward, ends near the middle of the greater sciatic notch. ...
The internal surface of the ala is bounded above by the crest, below, by the arcuate line; in front and behind, by the anterior and posterior borders. ...
The anterior superior iliac spine (ASIS) is an important landmark of surface anatomy. ...
Below the Sartorius notch of the anterior border of the ala of the ilium is the anterior inferior iliac spine, which ends in the upper lip of the acetabulum; it gives attachment to the straight tendon of the Rectus femoris and to the iliofemoral ligament of the hip-joint. ...
The posterior border of the ala, shorter than the anterior, also presents two projections separated by a notch, the posterior superior iliac spine and the posterior inferior iliac spine. ...
The posterior border of the ala, shorter than the anterior, also presents two projections separated by a notch, the posterior superior iliac spine and the posterior inferior iliac spine. ...
Human male pelvis, viewed from front Human female pelvis, viewed from front The pelvis is the bony structure located at the base of the spine (properly known as the caudal end). ...
Behind the iliac fossa is a rough surface, divided into two portions, an anterior and a posterior. ...
Human male pelvis, viewed from front Human female pelvis, viewed from front The pelvis is the bony structure located at the base of the spine (properly known as the caudal end). ...
The body of the ischium enters into and constitutes a little more than two-fifths of the acetabulum. ...
From the posterior border of the body of the Ischium there extends backward a thin and pointed triangular eminence, the ischial spine, more or less elongated in different subjects. ...
Below the ischial spine is a smaller notch, the lesser sciatic notch; it is smooth, coated in the recent state with cartilage, the surface of which presents two or three ridges corresponding to the subdivisions of the tendon of the Obturator internus, which winds over it. ...
The superior ramus of the ischium (descending ramus) projects downward and backward from the body and presents for examination three surfaces: external, internal, and posterior. ...
Posteriorly the Superior ramus of the ischium forms a large swelling, the tuberosity of the ischium, which is divided into two portions: a lower, rough, somewhat triangular part, and an upper, smooth, quadrilateral portion. ...
The Inferior Ramus of the ischium (ascending ramus) is the thin, flattened part of the ischium, which ascends from the superior ramus, and joins the inferior ramus of the pubisâthe junction being indicated in the adult by a raised line. ...
The pubis, the anterior part of the hip bone, is divisible into a body, a superior and an inferior ramus. ...
The superior pubic ramus extends from the body to the median plane where it articulates with its fellow of the opposite side. ...
The upper border of the medial portion of the superior ramus of the pubis presents a prominent tubercle, the pubic tubercle (pubic spine), which projects forward. ...
Medial to the pubic tubercle is the pubic crest, which extends from this process to the medial end of the bone. ...
The lateral portion of superior ramus of the ischium presents a sharp margin, the obturator crest, which forms part of the circumference of the obturator foramen and affords attachment to the obturator membrane. ...
The inferior pubic ramus is thin and flattened. ...
The pecten pubis or pectinate line of the pubis is a ridge on the superior ramus of the pubic bone. ...
This article is about anatomical region. ...
The acetabulum presents below a deep notch, the acetabular notch, which is continuous with a circular non-articular depression, the acetabular fossa, at the bottom of the cavity: this depression is perforated by numerous apertures, and lodges a mass of fat. ...
The ischiopubic ramus is a compound structure consisting of the following two structures: from the pubis, the inferior pubic ramus from the ischium, the inferior ramus of the ischium It serves as part of the origin for the Obturator internus muscle. ...
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The obturator foramen is the hole created by the ischium, ilium, and pubic bones of the pelvis through which nerves and muscles pass. ...
The greater sciatic foramen is bounded, in front and above, by the posterior border of the hip bone; behind, by the sacrotuberous ligament; and below, by the sacrospinous ligament. ...
The greater sciatic foramen is bounded, in front and above, by the posterior border of the hip bone; behind, by the sacrotuberous ligament; and below, by the sacrospinous ligament. ...
An opening between the pelvis and the posterior thigh, the foramen is formed by the sacrotuberous ligament which runs between the sacrum and the ischial tuberosity. ...
Lesser pelvis ( Pelvic inlet, Pelvic brim, Pelvic outlet) - Greater pelvis | | The lesser pelvis (or true pelvis) is that part of the pelvic cavity which is situated below and behind the pelvic brim. ...
The lesser pelvis (or true pelvis) is that part of the pelvic cavity which is situated below and behind the pelvic brim. ...
The pelvis is divided by an oblique plane passing through the prominence of the sacrum, the arcuate and pectineal lines, and the upper margin of the symphysis pubis, into the greater pelvis and the lesser pelvis. ...
The lower circumference of the lesser pelvis is very irregular; the space enclosed by it is named the inferior aperture or outlet (apertura pelvis [minoris] inferior), and is bounded behind by the point of the coccyx, and laterally by the ischial tuberosities. ...
The greater pelvis (or false pelvis) is the expanded portion of the cavity situated above and in front of the pelvic brim. ...
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