Lecture 20 (4-3) - Functions of Bone: Musculoskeletal...

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Functions of Bone: Musculoskeletal system (endoskeleton) Blood cell formation and fat storage Calcium reservoir Cells in bone development, growth and remodeling: Osteoblasts are bone-forming cells. Osteocytes are mature bone cells. Osteoclasts break down and reabsorb bone . Intramembranous ossification: Intramembranous ossification involves the replacement of sheet-like connective tissue membranes with bony tissue. They include certain flat bones of the skull and some of the irregular bones. The future bones are first formed as connective tissue membranes. Osteoblasts migrate to the membranes and deposit bony matrix around themselves. When the osteoblasts are surrounded by matrix they are called osteocytes. Endochondral Ossification: Endochondral ossification involves the replacement of hyaline cartilage with bony tissue. Most of the bones of the skeleton are formed in this manner. During the third month after conception, the perichondrium that surrounds the hyaline cartilage "models" becomes infiltrated with blood vessels and osteoblasts
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This note was uploaded on 04/02/2008 for the course ANTHRO 1 taught by Professor Wilkie during the Spring '08 term at University of California, Berkeley.

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Lecture 20 (4-3) - Functions of Bone: Musculoskeletal...

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