Question

. In a 400m race competition ,Athira won the first place. Her friends commented that it is due to her vital capacity
a)What do you understand by the term vital capacity?

Answer 1

Vital capacity (VC) is the maximum amount of air a person can expel from the lungs after a maximum inhalation. It is equal to the sum of inspiratory reserve volume, tidal volume, and expiratory reserve volume.

A person's vital capacity can be measured by a wet or regular spirometer.

A normal adult has a vital capacity between 3 and 5 litres.A human's vital capacity depends on age, sex, height, mass, and ethnicity.

Answer 2

It is maximum volume of air inspired after forcefully expiration that is irv ,erv and tidal volume