The lung volume that represents the total volume of exchangeable air is the vital capacity.
What is vital capacity?
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. It is calculated by summing tidal volume, inspiratory reserve volume, and expiratory reserve volume. VC = TV+IRV+ERV.
The vital capacity is the lung volume, which corresponds to the entire amount of air that may be exchanged. The amount of air that can be inhaled and exhaled during maximum inspiration and expiration is known as the vital capacity.
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