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Select the correct option regarding respiratory volumes.
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The correct answer is:
Vital capacity of lungs = Total lung capacity - Residual air
Vital capacity of lungs is the maximum volume of air a person can breathe in after forced expiration. This includes ERV, TV, and IRV or the maximum volume of air a person can breathe out after a forced inspiration.
VC = TV + ERV + RV
Total lung capacity is the sum of the vital capacity and residual volume i.e.,
TLC = VC + RV
Hence, VC = TV - RV
VC = TV + ERV + RV
Total lung capacity is the sum of the vital capacity and residual volume i.e.,
TLC = VC + RV
Hence, VC = TV - RV
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