Question

Bones are covered and lined by a protective tissue called periosteum. The inner (osteogenic) layer consists primarily of what?

Answer 1

Progenitor or osteogenic cells

Explanation:

The inner layer of periosteum is known as osteogenic periosteum or cambium and is primarily made up of progenitor cells. These progenitor cells later develop into osteoblasts. These osteoblasts then play very salient role in growth and repair of bony tissue.

Most growth in bones is produced by osteoblasts. Osteoblasts produce hard mineral matrix by absorbing `Ca^(2+)` ions in the blood. In case of fracture or are damage to bones, the osteoblasts of the periosteum repair the damage and replace the mineral matrix, often reinforcing the bone beyond its original thickness

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