Question

Which of the following statement is true for the periosteum of bone

• A. Protects the bone by assisting in fracture repair
• B. Has osteogenic cells which enable bone to grow in thickness, but not in length
• C. It is composed of an outer fibrous layer of dense irregular connective tissue and an inner osteogenic layer that consists of cells
• D. All of these

Answer 1

The Correct Option is D

To determine the correct statement about the periosteum of bone, let's examine each option in detail.

1. Protects the bone by assisting in fracture repair: The periosteum does indeed play a critical role in bone protection and repair. It contains blood vessels and nerves, which are essential for nourishing the bone and promoting healing after fractures.
2. Has osteogenic cells which enable bone to grow in thickness, but not in length: The periosteum contains osteogenic cells in its inner layer. These cells are crucial for appositional growth, which is responsible for an increase in bone thickness. Lengthwise growth occurs at the epiphyseal plates (growth plates), not the periosteum.
3. It is composed of an outer fibrous layer of dense irregular connective tissue and an inner osteogenic layer that consists of cells: This statement is anatomically correct. The periosteum consists of an outer fibrous layer, made of dense irregular connective tissue, that provides structural integrity and support, and an inner layer that is osteogenic and plays a role in bone growth and healing.

Each statement accurately describes a different aspect of the periosteum. Therefore, the correct answer is "All of these", as all the given statements are true and describe the features of the periosteum concisely and accurately.