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

Osteoblast

An osteoblast (from the Greek words for "bone" and "to build")is a cell, which produces osteoid. In addition, osteoblasts also secrete an enzyme which facilitates mineral deposition, within osteoid matrices. As osteoblasts age, they become osteocytes. Osteoblasts are differentiated from undifferentiated mesenchymal cells when they are subjected to bone morphogenetic proteins.

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