Sarcomere is a segment of strated muscle fibre between consecutive Z-lines .

Explanation

### Step-by-Step Solution:

1. **Definition of Sarcomere**: A sarcomere is defined as the basic structural and functional unit of striated muscle fibers. It is the segment of muscle fiber that lies between two consecutive Z-lines.

2. **Structure of Sarcomere**: The sarcomere consists of two main types of filaments:
- **Actin Filaments**: These are the thin filaments.
- **Myosin Filaments**: These are the thick filaments.

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