musculoskeletal system videos
Musculoskeletal System: Inside Our Bones
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Bones are not permanent. The minerals needed for the hard part of the bones, calcium and phosphorus, get dissolved and carried away by blood vessels. The blood vessels deliver new minerals to build... (more info)

Bones are not permanent. The minerals needed for the hard part of the bones, calcium and phosphorus, get dissolved and carried away by blood vessels. The blood vessels deliver new minerals to build up new bone.

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