Question

volume of air remain in the lungs after normal expectation is​

Answer 1

Answer:

6 litres of air

Explanation:

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 air that is inhaled or exhaled in only a single such breath.

Answer 2

The volume of air remaining in the lungs after a normal expiration is known as functional residual capacity (FRC). It includes expiratory reserve volume (ERV) and residual volume (RV). ERV is the maximum volume of air that can be exhaled after a normal expiration. It is about 1000 mL to 1500 mL. RV is the volume of air remaining in the lungs after maximum expiration. It is about 1100 mL to 1500 mL.

∴ FRC = ERV + RV

≅ 1500 + 1500

≅ 3000 mL

The functional residual capacity of the human lungs is about 2500 – 3000 mL.