Explain why, when air is taken in and let out during breathing, the lungs always contain a residual volume of air.

When air is taken in and let out during breathing, the lungs always contain a residual volume of air so that there is a sufficient amount of oxygen present for oxygen to be absorbed into the blood and carbon dioxide to be released from the blood.

The residual volume of air also functions to keep the alveoli open even after maximum respiration.
 

Tutorialspoint

Simply Easy Learning

Updated on: 24-Mar-2023

20 Views

Kickstart Your Career

Get certified by completing the course

Get Started