Vital capacity is:: (A) Tidal volume + Expiratory Reserve Volume, (B) Tidal volume + Inspiratory Reserve Volume, (C) I.R.V. + E. R.V., (D) T.V. + I.R.V. + E.R.V.
Answer is D. Ans. D. T.V. + I.R.V. + E.R.V.Lungs capacitiesVC=IRV+TV+ERVIC=IRV+TVVC=IC+ERVFRC=ERV+RV(b)TLC=IRV+TV+ERV+RVor =IC+FRVor =VC+RVFig.: Diagram showing respiratory excursions during normal breathing and during maximal inspiration and maximal expiration