Question

The most important function of diaphragm of the mammals is?

• A. To divide the body cavity into compartment
• B. To protect lungs
• C. To aid in respiration
• D. To aid in ventilation

Answer 1

The correct option is D To aid in ventilation

D. To aid in ventilation

Reason: A dome-shaped muscular structure which differentiates between the thoracic and the abdominal region of the body, is called diaphragm. It helps in the ventilation, the process through which the gas moves inward and outward of the lung. During the inspiration and expiration process, it contracts and relaxes respectively to change the volume of thoracic cavity that creates a pressure difference between the lungs and outer atmosphere which helps to inhale and exhale.

So the correct option is D.