Structure which joins two bones at the joints is formed of

Options

A. Collagen fibres
B. Elastic fibres
C. Chondrocytes
D. Fibroblasts.

Answer

To solve the question regarding the structure that joins two bones at the joints, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the structure that connects two bones at a joint. This structure is crucial for the stability and function of the skeletal system.

2. **Identifying the Options**: The options provided are:
- Collagen fibers
- Elastic fibers
- Chondrocytes
- Fibroblasts

3. **Analyzing Each Option**:
- **Collagen fibers**: These are strong, fibrous proteins that form ligaments, which connect bones at joints. They provide stability and strength.
- **Elastic fibers**: These fibers provide elasticity and flexibility but are not the primary component of ligaments.
- **Chondrocytes**: These are cells found in cartilage, not involved in connecting bones directly.
- **Fibroblasts**: These are cells that produce fibers, including collagen, but they do not form the structure that connects bones.

4. **Conclusion**: Based on the analysis, the structure that joins two bones at the joints is primarily made up of collagen fibers, which form ligaments.

5. **Final Answer**: The correct answer is **collagen fibers**.