Question

what are function of residual volume of air in the lungs

Answer 1

The residual volume functions to keep the alveoli open even after maximum expiration. In healthylungs, the air that makes up the residual volumeallows for continual gas exchange to occur between breaths. The oxygen-depleted residual airis then mixed with newly inhaled air to improve gas exchange at the alveoli.



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Answer 2

Residual volume is the amount of gas remaining in the lungs at the end of a maximal exhalation. Residual Volume is important because it prevents the lungs from collapsing. Even after we have expelled as much air as possible (expiratory reserve volume) gaseous exchange is still occurring by residual volume in the lungs.