Question

During breathing what is the advantage of residual air in lungs. Explain in 2 points...

Answer 1

Lung volumes and lung capacities refer to the volume of air associated with different phases of the respiratory cycle. The average total lung capacity of an adult human male is about 6 litres of air. Tidal breathing is normal, resting breathing; the tidal volume is the volume of ... Specific changes in lung volumes also occur during pregnancy.

Answer 2

it uses more filteration of air
there would be more oxygen