How does contraction of muscle fibres occur?

Explanation

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

1. **Understanding Muscle Contraction**: Muscle contraction can be explained through the sliding filament theory, which describes how muscle fibers shorten during contraction.

2. **Role of Myofilaments**: In a muscle fiber, there are two types of myofilaments: thick (myosin) and thin (actin). During contraction, these myofilaments interact with each other.

3. **Sliding Mechanism**: According to the sliding filament theory, during muscle contraction, the thin myofilaments (actin) slide inward towards the H zone (the central region of the sarcomere).

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