Question

What is the relevance of residual volume of air in the lungs?​

Answer 1

Residual volume is necessary for breathing and proper lung function. This air that remains in the lungs is also important for preventing large fluctuations in respiratory gases—oxygen (O2) and carbon dioxide (CO2).

Answer 2

Answer:

The residual volume functions to keep the alveoli open even after maximum expiration. In healthy lungs, the air that makes up the residual volume is utilized for continual gas exchange to occur between breaths.