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Bone & Cartilage Development - Anatomy & Physiology (view source)
Revision as of 10:56, 31 August 2008
, 10:56, 31 August 2008→Bone Growth
#'''Dead cells''' become the matrix for bone growth.
#'''Dead cells''' become the matrix for bone growth.
===Girth===
*The '''perisosteum''' lines the outer surfae of the diaphysis of the bone.
**It has a cellular inner layer, consisting of osteoblasts, and a fibrous outer layer.
*The '''endosteum''' lines the inner surface of the diaphysis of the bone.
**It contains osteoblasts ''and'' osteoclasts.
*''Bone growth occurs by a shift in the equilibrium between osteoblasts and osteoclasts''.
**Osteoblasts on the outside in the periosteum, add bone to increase the bone's diameter.
**Osteoclasts on the inside in the endosteum remove this bone to maintain bone diameter.
**When osteoclasts start removing less bone, or osteoblasts start adding more bone, the girth increases.