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Bone is broken down and built up all the time. This occurs on the surface of all bone types. About 10% of bone is replaced each year. Osteoblasts build bone. Osteoclasts break it down. Calcium is needed for this process.

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11y ago
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9y ago

All bone types break down (by osteoclasts) and build up (by osteoblasts) all of the time. About 10% of bone is replaced each year.

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Q: Describe bone physiology and the bone remodeling cycle?
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