Question

what is the benefit of resedual volume in air in respiratory system?

Answer 1

"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."

Answer 2

resedual vol is Amt of air left in lungs after expiratory reserved vol is exhaled. the lungs are never empty so importance of resedual vol is that they prevent large fluctuation in respiratory gases like O2 and CO2