Vital Capacity: The vital capacity is called the sum total volume of air that can be expired after maximum inhalation or maximum air that a person can breathe in after forced expiration. It is very important to measure a person’s respiratory health. A decreased vital capacity also seems to be an indication of restrictive lung disease where the lungs cannot expand out completely. In such cases of normal vital capacity, this improper functioning of the lungs indicates obstructive lung disease where the lungs are blocked in the airways. VC = Tidal volume(TV) + Expiratory reseve volume(ERV) + Inspiratory reserve volume(IRV).

Lung capacity or total lung capacity (TLC) is the volume of air in the lungs upon the maximum effort of inspiration.  Among healthy adults, the average lung capacity is about 6 liters.

Vital Capacity

The vital capacity is the total volume of air that can be expired after a maximum inhalation or maximum air that a person can breathe in after forced expiration. It is an important measure of a person’s respiratory health. A decreased vital capacity is an indication of restrictive lung disease where the lungs cannot expand completely. In the case of normal vital capacity, the improper functioning of lungs indicates obstructive lung disease where the lungs are blocked in the airways.

VC = Tidal volume(TV) + Expiratory reseve volume(ERV) + Inspiratory reserve volume(IRV).

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By Team Learning Mantras