Bone Growth · Histology

Which process allows bones to increase in diameter or thickness?

  1. Appositional growth
  2. Endochondral ossification
  3. Interstitial bone growth
  4. Cortical drift
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Correct answer: Appositional growth

Appositional growth occurs when osteoblasts in the inner layer of the periosteum deposit new bone matrix on the outer surface. Unlike cartilage, bone can only grow appositionally because its calcified matrix prevents interstitial expansion.

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