Muscle cells are called muscle fibres. Why?

Explanation

**Step-by-Step Solution:**

1. **Definition of Muscle Cells**: Muscle cells are specialized cells that make up muscle tissue in the body. They are responsible for movement and contraction.

2. **Shape of Muscle Cells**: Muscle cells are characterized by their long, cylindrical shape. This elongated form resembles fibers, which is a key reason they are referred to as "muscle fibers."

3. **Functionality**: Muscle fibers have the unique ability to contract and relax. This contraction is essential for movement in the body, whether it be voluntary movements like walking or involuntary movements like the heartbeat.

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