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Encyclopedia > Axial skeleton
diagram of the axial skeleton
diagram of the axial skeleton

The axial skeleton consists of the 80 bones in the head and trunk of the human body. It is composed of five parts; the human skull, the ossicles of the inner ear, the hyoid bone of the throat, the chest, and the vertebral column. The axial skeleton and the appendicular skeleton together form the complete skeleton. Image File history File links Axial_skeleton_diagram. ... Image File history File links Axial_skeleton_diagram. ... In humans, the adult skull is normally made up of 22 bones. ... 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. ... Male Chest The chest is a part of the anatomy of humans and various other animals. ... 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. ... Appendicular skeleton diagram The appendicular skeleton, consisting of 126 bones, makes body movement possible and protects the organs of digestion, excretion, and reproduction. ... For other uses, see Skeleton (disambiguation). ...

Contents

Overview

Protective or flat bones house the brain spinal cord and other vital organs. The purpose of the axial skeleton (among other things) is to protect the body's most vital organs. All vertebrates have an axial skeleton. This article mainly deals with the axial skeletons of humans; however, it is important to understand the evolutionary lineage of the axial skeleton. The axial skeleton has 80 bones in it. This article is about the skeletal organs. ... The human brain In animals, the brain (enkephalos) (Greek for in the skull), is the control center of the central nervous system, responsible for behavior. ... The Spinal cord nested in the vertebral column. ... The Vital organs are the internal organs of the human body necessary to maintain life. ... Typical classes Petromyzontidae (lampreys) Placodermi - extinct Chondrichthyes (cartilaginous fish) Acanthodii - extinct Actinopterygii (ray-finned fish) Actinistia (coelacanths) Dipnoi (lungfish) Amphibia (amphibians) Reptilia (reptiles) Aves (birds) Mammalia (mammals) Vertebrata is a subphylum of chordates, specifically, those with backbones or spinal columns. ... This article is about evolution in biology. ...


Skull

Main article: Human skull

Skull (22) In humans, the adult skull is normally made up of 22 bones. ...

  • Cranial Bones (8)
    • Parietal (2)
    • Temporal (2)
    • Frontal (1)
    • Occipital (1)
    • Ethmoid (1)
    • ethan charles snow is a faget (1)
  • Facial Bones (14)
    • Maxilla (2)
    • Zygomatic (2)
    • Mandible (1)
    • Nasal (2)
    • Palatine (2)
    • Inferior nasal concha (2)
    • Lacrimal (2)
    • Vomer (1)

Auditory Ossicles

Ossicles (6)

  • Malleus (2)
  • Incus (2)
  • Stapes (2)

Hyoid bone

Hyoid bone (1) U-shape bone located in the neck. It anchors the tongue and is associated with swallowing.


Vertebral column

Main article: Vertebral column

Vetebral Column (26) 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. ...

  • Cervical vertebrae (7)
  • Thoracic vertebrae (12)
  • Lumbar vertebrae (5)
  • Sacrum (1)
  • Coccyx (1)

Chest

Main article: Chest

Thoracic cage (25) Male Chest The chest is a part of the anatomy of humans and various other animals. ...

  • Sternum (1)
  • Ribs (24)

External links

  • botany.uwc.ac.za

  Results from FactBites:
 
skeletal system: Definition and Much More from Answers.com (2317 words)
The vertebrate skeleton consists of the axial skeleton (skull, vertebral column, and associated structures) and the appendicular skeleton (limbs or appendages).
The axial skeleton supports and protects the organs of the head, neck, and torso, and in humans it comprises the skull, ear ossicles, hyoid bone, vertebral column, and rib cage.
The visceral skeleton, the skeleton of the pharyngeal arches, is demonstrated in a general form by the elasmobranch fishes, where all the elements are cartilaginous and support the jaws and the gills.
  More results at FactBites »


 

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