Where are inspiratory and expirtory centres located ?

Explanation

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the location of the inspiratory and expiratory centers, which are crucial for the process of breathing.

2. **Defining Inspiratory and Expiratory Centers**:
- The **inspiratory center** is responsible for controlling the process of inspiration (breathing in).
- The **expiratory center** is responsible for controlling the process of expiration (breathing out).

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