Question

Short / long answer type questions.
Gaseous exchanges continue in lungs without interruption even during expiration. Explain.

Answer 1

The gaseous exchange continues in the lungs even during expiration because expiration is the result of reverse movements of the ribs and diaphragm. As a consequence of the movements of the ribs and the diaphragm, the thoracic cavity is diminished and the lungs are compressed, forcing the air out into the atmosphere.