The Vital Capacity is the maximum volume of air that can be exhaled after taking the deepest breath possible.
Breath is the inhalation or exhalation of air for maintaining the gaseous exchange. Inhalation is taking the air (for oxygen) inside the lungs. Whereas exhalation is the removal of air (of carbon dioxide) outside the lungs.
Vital Capacity can also be denoted as VC. Mathematically, it is equal to the sum of  Inspiratory Reserve Volume, Tidal Volume, and Expiratory Reserve Volume. The volume of VC is approximately 4800 mL. However, the amount can vary according to the age and health of a person.
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