Define vital capacity. What is it\'s significance?

1.	Define vital capacity. What is it\'s significance?
Answer» Vital capacity is the amount of air which one can inhale with maximum effort and also exhale with maximum effort. It is about 3.5 to 4.5 litre in a normal adult person. It represents the maximum amount of air one can renew in the respiratory system in a single respiration. Thus, greater the vital capacity, more is the energy available to the body.

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