Periosteum · Histology

Histologically, the periosteum of a growing child differs from that of an adult by having:

  1. Fewer periosteal blood vessels
  2. Heavily calcified collagen fibers
  3. Reduced Sharpey's fiber density
  4. A more active osteogenic layer
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Correct answer: A more active osteogenic layer

In children, the periosteum is thicker and more vascular, with a highly active inner layer to facilitate rapid bone growth. In adults, the osteogenic layer becomes quiescent but remains capable of activation for repair.

Difficulty: Medium Question 13 of 20

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