what is vital capacity of our lungs

Options

A. inspiratory reserve volume plus tidal volume
B. Total lung capacity minius expiratiory reserve volume
C. Inspiratory reserve volume plus expiratory reserve volume
D. Total lung capacity minus residual volume

Answer

D

Explanation

Vital capacity is the sum of inspiratory reserve volume tidal volume and expiratory reseve volume. It is about 4800 mL ltrbgt Total lund capacity is the sum of vital capacity and residual volume i.e vital capacity ofour lungs is total lung capacity minus residual voume. Tidal volume is the amount of air which normally passes in to and out of the lungs during each cyucle of quite breathing .It is about 800 mL in adult person.