Ncert Exercises & Solutions

A person breathes in some volume of air by forced inspiration after having a forced expiration. This quantity of air taken in is

1. total lung capacity

2. tidal volume

3. vital capacity

4. inspiratory capacity

(c) The maximum volumeofair that a person can breathe in after forced expiration or the maximum volumeof air that a person can breathe out after forcedinspiration is called vital capacity
VC = IRV +ERV + TV (Inspiratory reserve volume) (Expiratory reserve volume ) (Tidal volume) The value of vital capacity varies from 3400 mL to 4800 mL.
On the other hand, tidal volumeis the air inspired or expired during normal breathing. Total lung capacity is the volume of air present in lungs and respiratory passage after maximum inspiration. Whereas, inspiratory capacity is total volumeofair that a person can inspire after normal inspiration.

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