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Revision as of 18:51, 8 January 2003 by 205.222.241.140 (talk) (Stubbed)(diff) ← Previous revision | Latest revision (diff) | Newer revision → (diff)The basic structural element of the animal body, bones are composed of cells living in a calcium matrix. If/when the bone is broken, the cells are brought out of their semi-stasis to repair the calcium matrix of the bone.