The Osteoclast reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Osteoclast

Osteoclast is a cell that reabsorbs old bone so that osteoblast cells can replace it with new one. If there is an imbalance between bone resorption and bone formation then osteoporosis occurs. Osteoclasts are differentiated from hemopoietic cells of the monocyte/macrophage lineage.

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