Ligaments are bundles of elastic and collagen fibers that :

Options

A. connect one bone to another bone
B. attach skeletal muscle to bones
C. connect one muscle to another muscle
D. cover the surface of a muscle

Answer

### Step-by-Step Solution:

1. **Understanding Ligaments**:
- Ligaments are specialized connective tissues that consist of bundles of elastic and collagen fibers. They play a crucial role in the skeletal system.

2. **Types of Tissues**:
- There are two main types of dense regular connective tissues: white fibrous tissue and yellow elastic tissue. Ligaments are classified under white fibrous tissue.

3. **Function of Ligaments**:
- The primary function of ligaments is to connect one bone to another bone. This provides stability to joints and helps maintain the structural integrity of the skeletal system.

4. **Analyzing the Options**:
- **Option 1**: Connect one bone to another bone - This is correct as it describes the primary function of ligaments.
- **Option 2**: Attach skeletal muscle to bones - This is incorrect. Tendons, not ligaments, perform this function.
- **Option 3**: Connect one muscle to another muscle - This is also incorrect; ligaments do not connect muscles.
- **Option 4**: Cover the surface of a muscle - This is incorrect as well; ligaments do not cover muscles.

5. **Conclusion**:
- After analyzing all the options, the correct answer is that ligaments connect one bone to another bone.

### Final Answer:
Ligaments are bundles of elastic and collagen fibers that connect one bone to another bone.