NationMaster - Encyclopedia: Cortical bone

Cortical bone, also known as compact bone is one of two main types of osseous tissues. Cortical bone is dense and forms the surface of bones, contributing 80% of the weight of a human skeleton. It is extremely hard, formed of multiple stacked layers with few gaps. Image File history File links Illu_compact_spongy_bone. ... Osseous tissue, or bone tissue is the major structural and supportive connective tissue of the body. ...

The other major type of bone is trabecular or cancellous bone; it is spongy and makes up the bulk of the interior of most bones, including the vertebrae. Its main function is to support the body, protect organs, provide levers for movement and (shared with cancellous bone), store minerals. Cancellous bone (or trabecular bone, or spongy bone) is a spongy type of bone with a very high surface area, found at the ends of long bones. ... A diagram of a thoracic vertebra. ...

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Categories: Musculoskeletal system stubs | Skeletal system eMedicine is an online clinical medical knowledge base that was founded in 1996. ... Image File history File links Download high-resolution version (609x1165, 138 KB) Plastische Anatomie des menschlichen KÃ¶rpers fÃ¼r KÃ¼nstler und freunde der kunst von Dr. Julius Kollmann o. ... The musculoskeletal system is an organ system that gives animals the ability to physically move, by using the muscles and skeletal system. ... This article is about the skeletal organs. ... Cartilage is a type of dense connective tissue. ... Cartilage is a type of dense connective tissue. ... A chondroblast is a cell, which originates from a mesenchymal stem cell and forms Chondrocytes, commonly known as cartilage cells. ... Chondrocytes (< Greek chondros cartilage + kytos cell) are the only cells found in cartilage. ... The perichondrium is a layer of dense connective tissue which surrounds the cartilage. ... Cartilage is type of dense connective tissue. ... Elastic cartilage is a type of cartilage present in the outer ear, larynx, and epiglottis which contains fibers made of elastin. ... Cartilage is type of dense connective tissue. ... A fibrocartilage callus is a temporary fibrocartilage callus which forms as bone attemps to heal a fracture. ... The metaphysis is the body of cartilage that separates the epiphyses and the diaphysis of long bones during growth. ... This article is about the skeletal organs. ... Ossification is the process of bone formation, in which connective tissues, such as cartilage are turned to bone or bone-like tissue. ... Osteoblasts and osteoclasts on trabecula of lower jaw of calf embryo. ... Section of fetal bone of cat. ... 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. ... An osteoblast (from the Greek words for bone and germ or embryonic) is a mononucleate cell that is responsible for bone formation. ... Osteoid is a protein mixture which is secreted by osteoblasts. ... An osteocyte, a star-shaped cell, is the most abundant cell found in bone. ... An osteoclast (from the Greek words for bone and broken) is a type of bone cell that removes bone tissue by removing the bones mineralized matrix. ... Cancellous bone (or trabecular bone, or spongy bone) is a spongy type of bone with a very high surface area, found at the ends of long bones. ... For other uses of the word bone, see bone (disambiguation). ... The metaphysis is the body of cartilage that separates the epiphyses and the diaphysis of long bones during growth. ... The diaphysis is the main or mid section (shaft) of a long bone. ... Osteons (cross section) Osteons (also called Haversian system in honor of Clopton Havers) are predominant structures found in some lamellar or compact bone. ... Haversian canals are a series of tubes around narrow channels formed by lamellae. ... Endosteum is the inner lining of the bone. ... The periosteum is an envelope of fibrous connective tissue that is wrapped around the bone in all places except at joints (which are protected by cartilage). ... Sharpeys fibres (bone fibres, or perforating fibres) are a matrix of connective tissue consisting of bundles of strong collagenous fibres connecting periosteum to bone. ... Enthesis (plural: entheses) is the point at which a tendon inserts into bone, where the collagen fibres are mineralised and integrated into bone tissue. ... In histology, a lacuna is a small space containing an osteocyte in bone or chondrocyte in cartilage. ... Canaliculi are small, microscopic canals between the various lacunae of ossified bone. ... Definition and etymology trabeculae. ... The medullary cavity is the central cavity of bone shafts where yellow marrow (adipose tissue) is stored. ... This article does not cite any references or sources. ... 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. ... Where a part of the skeleton is intended for strength and compactness combined with limited movement, it is constructed of a number of short bones, as in the carpus and tarsus. ... Flat Bones. ... The irregular bones are such as, from their peculiar form, cannot be grouped as long bone, short bone, or flat bone. ... In anatomy, a sesamoid bone is a bone embedded within a tendon. ...