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Lungs are made up of air-filled sacs, th...

Lungs are made up of air-filled sacs, the alveoli . They do not collapse even after forceful expiration because of

A

Residual volume (RV)

B

Inspiratory Reserve volume (IRV)

C

Tidal volume (TV)

D

Expiratiory reserve volume (ERV)

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Verified by Experts

The correct Answer is:
A
In lungs even after the most forceful expiration some of the volume of air remains .This volume is termed residual volume (RV) .Dlue to this lungs do not collapse evben after the most forceful expiration RV is about 1100 mL -1200 mL.
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NEET PREVIOUS YEAR (YEARWISE + CHAPTERWISE)-Breathing and Respiration -Exercise
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