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3.2:bones (bone remodeling (importance: bone growth repair, calcium ion…
3.2:bones
bone remodeling
removal of existing bones by osteoclasts, deposition of new bone by osteoblasts
importance: bone growth repair, calcium ion regulation,
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bone repair steps
- surrounding cells produce fibrous network of connective tissue to hold bone fragments tgt
- zone of repair btw 2 fragments = callus
- osteoblasts enter callus, begin forming spongy bone(repaired after 4-6 wks of injury)
- spongy bone slowly remodelled to compact bone
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classification
bone shapes
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irregular eg vertebrae column, hipbone
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