Question

why do lungs always contain a residual volume of air?

Answer 1

The lungs always contain a residual volume of air so that during breathing cycle there is sufficient time for oxygen to be absorbed and for the carbon dioxide to be released. Residual Volume is important because it prevents the lungs from collapsing.

Answer 2

Residual volume is the amount of gas remaining in the lungs at the end of a maximal exhalation.The lungs always contain a residual volume of air so that during breathing cycle there is sufficient time for oxygen to be absorbed and for the carbon dioxide to be released. Residual Volume is important because it prevents the lungs from collapsing.