Question

Vital capacity of lung is ______.

Options

• IRV + ERV + TV + RV

• IRV + ERV + TV − RV

• IRV + ERV + TV

• IRV + ERV

Answer 1

Vital capacity of lung is IRV + ERV + TV.

Explanation:

Vital capacity is the total volume of air a person can push out of their lungs with maximum effort following the deepest possible breath. It is calculated by adding together the Inspiratory Reserve Volume (IRV), the Tidal Volume (TV), and the Expiratory Reserve Volume (ERV). Essentially, it represents the maximum usable gas exchange capacity of the lungs.

Vital Capacity = IRV + TV + ERV