Periosteum · Histology

Under a microscope, fibroblasts in the periosteum are distinguished by their:

  1. Spindle shape and elongated nuclei
  2. Lacunae and surrounding calcified matrix
  3. Multiple nuclei and ruffled borders
  4. Striated cytoplasm
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Correct answer: Spindle shape and elongated nuclei

Fibroblasts are the primary cell type in the fibrous layer of the periosteum. They appear as spindle-shaped cells with flat, dark-staining nuclei, characteristic of active connective tissue cells.

Difficulty: Medium Question 17 of 20

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