What does sarcomere comprise of?

Explanation

**Step-by-Step Text Solution:**

1. **Definition of Sarcomere**: A sarcomere is the basic structural and functional unit of striated (skeletal) muscle tissue. It is responsible for muscle contraction.

2. **Components of Sarcomere**: The sarcomere is primarily composed of two types of contractile proteins:
- **Actin**: This protein forms the thin filaments and is represented as light-colored bands under a microscope.
- **Myosin**: This protein forms the thick filaments and appears as dark-colored bands under a microscope.

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