Question

Human lungs capacity is approximately 5800ml . Most of the time breathing takes place in the upper lobes only. After complete exhalation approximately 1200ml of air remains in our lungs. So we can make, use of 4600ml of lung capacity for breathing. Think what changes are required to inhale that much air.

Answer 1

Answer:

To correct imbalance between ventilation and perfusion.

Explanation:

The lung has the capability to compensate for mismatches in ventilation and perfusion. If ventilation is greater than perfusion, the arterioles dilate and the bronchioles constrict, increasing perfusion while reducing ventilation. Likewise, if ventilation is less than perfusion, the arterioles constrict while the bronchioles dilate to correct the imbalance.