Name the inspiratory muscles which help in pulmonary ventilation in man.

Explanation

**Step-by-Step Solution:**

1. **Understanding Pulmonary Ventilation**: Pulmonary ventilation refers to the process of breathing, which includes inhalation (inspiration) and exhalation (expiration). During inspiration, air is drawn into the lungs, and during expiration, air is expelled from the lungs.

2. **Identifying Inspiratory Muscles**: The muscles involved in the process of inspiration are known as inspiratory muscles. These muscles contract to increase the volume of the thoracic cavity, allowing air to flow into the lungs.

3. **Key Inspiratory Muscles**:
- **Diaphragm**: The primary muscle of inspiration. When the diaphragm contracts, it moves downward, increasing the volume of the thoracic cavity and drawing air into the lungs.
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