The bone marrow is composed of

Options

A. muscle fibres and adipose tissue
B. areolar tissue and adipose tissue
C. adipose tissue and calcified cartilage
D. adipose tissue areolar tissue and blood vessel

Answer

**Step-by-Step Solution:**

1. **Understanding Bone Marrow Composition**:
- Bone marrow is a specialized tissue found within the cavities of bones. It plays a crucial role in the production of blood cells.

2. **Identifying Components of Bone Marrow**:
- The main components of bone marrow include:
- **Adipose Tissue**: This tissue stores fat and provides energy reserves.
- **Areolar Tissue**: This connective tissue provides support and elasticity to the bone marrow.
- **Blood Vessels**: These are essential for supplying nutrients and oxygen to the marrow and for the transportation of blood cells.

3. **Excluding Other Tissues**:
- Muscle fibers are not found in bone marrow; they are part of the muscular system.
- Calcified cartilage is associated with the structure of bones but is not a component of bone marrow.

4. **Conclusion**:
- Therefore, the bone marrow is primarily composed of adipose tissue, areolar tissue, and blood vessels.

**Final Answer**: Bone marrow is composed of adipose tissue, areolar tissue, and blood vessels.

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