Matrix of bone is compound of

Options

A. chondrin
B. ossein
C. osteon
D. auxin

Answer

**Step-by-Step Solution:**

1. **Understanding the Matrix of Bone**: The matrix of bone is the intercellular substance that provides structure and support to the bone tissue. It is composed of various organic and inorganic compounds.

2. **Identifying the Components**: The main components of the bone matrix include:
- **Chondrine**: This is a complex of protein and carbohydrate that helps retain water and maintain fluidity in joints and cartilage. However, it is primarily associated with cartilage rather than bone.
- **Osein**: This is a protein that combines with calcium to form the Osein Hydroxyapatite Complex (OHC), which is essential for bone strength and structure. Calcium is a critical mineral found in bones.
- **Osteon**: This is the structural unit of compact bone, consisting of a central canal surrounded by concentric rings of bone matrix. Osteons contain osteocytes, which are the bone-forming cells.
- **Auxin**: This is a plant hormone that regulates growth in plants and has no relevance to animal bones.

3. **Determining the Correct Answer**: Among the components listed, Osein is the most relevant to the matrix of bone as it contributes to the formation of the OHC and provides calcium, which is vital for bone strength.

4. **Final Conclusion**: Therefore, the correct answer to the question "Matrix of bone is composed of" is **Osein**.

---