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Question:

Lungs are made up of air-filled sacs, the alveoli. They do not collapse even after forceful expiration, because of: Expiratory Reserve Volume, Residual Volume, Inspiratory Reserve Volume, Tidal Volume

Residual Volume

Expiratory Reserve Volume

Tidal Volume

Inspiratory Reserve Volume

Solution:

The volume of air remaining in the lungs even after a forcible expiration is called residual volume. Thus, the correct answer is option B.