Cortical bone

Cortical bone
Cross-section of a bone showing both Cortical and Cancellous bone

Cortical bone, synonymous with compact bone, is one of the two types of osseous tissue that form bones. Cortical bone facilitates bone's main functions: to support the whole body, protect organs, provide levers for movement, and store and release chemical elements, mainly calcium. As its name implies, cortical bone forms the cortex, or outer shell, of most bones. Again, as its name implies, compact bone is much denser than cancellous bone, which is the other type of osseous tissue. Furthermore, it is harder, stronger and stiffer than cancellous bone. Cortical bone contributes about 80% of the weight of a human skeleton. The primary anatomical and functional unit of cortical bone is the osteon.

References

  • Netter, Frank H. (1987), Musculoskeletal system: anatomy, physiology, and metabolic disorders. Summit, New Jersey: Ciba-Geigy Corporation ISBN 0-914168-88-66

External links

v · d · eMusculoskeletal system · connective tissue: bone and cartilage (TA A02.0, TH H3.01, GA 2.86–95)
Cartilage
Bone
Cycle
Types
cancellous · cortical
Regions
subchondral bone · epiphysis · epiphyseal plate/metaphysis · diaphysis · Condyle · Epicondyle
Structure
osteon / Haversian system · Haversian canals · Volkmann's canals · connective tissue (endosteum · periosteum) · Sharpey's fibres · enthesis · lacunae · canaliculi · trabeculae · medullary cavity · bone marrow
Shapes
long · short · flat · irregular · sesamoid

M: BON/CAR

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noco/cong/tumr, sysi/epon, injr

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