ANATOMY

Detailed explanation-1: -Following maximal inspiration, the volume of air that leaves the lungs during a maximal force expiration is known as the vital capacity (VC). VC is composed of the tidal volume, expiratory reserve volume (ERV), and inspiratory reserve volume (IRV).

Detailed explanation-2: -It is the total amount of air exhaled after maximal inhalation. The value is about 4800mL and it varies according to age and body size.

Detailed explanation-3: -During normal breathing, the volume of air inspired or expired is known as Tidal volume. Its value is approximately 500 ml.

Detailed explanation-4: -The maximum volume of air that can be inspired after reaching the end of a normal, quiet expiration. It is the sum of the TIDAL VOLUME and the INSPIRATORY RESERVE VOLUME.

Detailed explanation-5: -Vital capacity. The maximum volume of air a person can breathe in after a forced expiration or the maximum volume of air a person can breathe out after a forced inspiration is called vital capacity.