Which of the following events of respiration involves the flow of air out of the lungs?
A) internal respiration
B) inspiration
C) external respiration
D) expiration
E) cellular respiration

Question

Quizplus · Accepted Answer

Expiration is the event of respiration that involves the flow of air out of the lungs. During expiration, the diaphragm and intercostal muscles relax, which decreases the volume of the thoracic cavity and increases the pressure within the lungs, leading to the expulsion of air.

Which of the Following Events of Respiration Involves the Flow