Explain the role of muscles in body movements.

Explanation

### Step-by-Step Solution:

1. **Understanding Bones and Muscles**:
- Bones are rigid structures made of calcium and phosphorus, which means they cannot move on their own. They provide the framework for the body.
- Muscles, on the other hand, are made of flexible fibers that can contract and relax, allowing for movement.

2. **Role of Tendons**:
- Tendons are the connective tissues that attach muscles to bones. When a muscle contracts, it pulls on the tendon, which in turn moves the bone.
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