Osteoblasts · Histology

During intramembranous ossification, osteoblasts cluster together to form:

  1. An ossification center
  2. The epiphyseal plate
  3. A secondary marrow cavity
  4. A motor unit
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Correct answer: An ossification center

Intramembranous ossification begins when mesenchymal cells aggregate and differentiate into osteoblasts. These clusters, known as ossification centers, start secreting osteoid directly into the embryonic connective tissue.

Difficulty: Medium Question 17 of 20

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