Locomotion requires a perfect coordinated activity of muscular……….systems.

Explanation

To answer the question, "Locomotion requires a perfect coordinated activity of muscular __________ systems," we need to identify the systems involved in locomotion.

### Step-by-Step Solution:

1. **Understand Locomotion**: Locomotion refers to the movement of an organism from one place to another. It is a complex process that involves various systems in the body.

2. **Identify the Systems Involved**:
- **Muscular System**: This system is responsible for the movement of muscles. Muscles contract and relax to facilitate movement.
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