Periosteum · Histology

The outer layer of the periosteum is primarily composed of:

  1. Osteoprogenitor cells
  2. Dense irregular connective tissue
  3. Hyaline cartilage and perichondrium
  4. Loose areolar tissue
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Correct answer: Dense irregular connective tissue

The outer fibrous layer of the periosteum consists of dense irregular connective tissue containing collagen fibers and fibroblasts. This layer provides structural support and serves as an attachment point for tendons and ligaments.

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