Interstitial Growth · Histology

How does the territorial matrix differ from the interterritorial matrix during interstitial growth?

  1. Territorial matrix is newer, richer in GAGs, and stains more intensely.
  2. Territorial matrix is older, more calcified, and contains fewer proteoglycans.
  3. Territorial matrix is composed exclusively of Type I collagen fibers.
  4. There is no significant chemical or staining difference between them.
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Correct answer: Territorial matrix is newer, richer in GAGs, and stains more intensely.

The territorial matrix immediately surrounds the lacunae of isogenous groups. It is high in chondroitin sulfate and low in collagen compared to the interterritorial matrix, leading to its characteristic deep basophilia.

Difficulty: Medium Question 14 of 20

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