| $a$. Inspiratory reserve volume $(IRV)$ | $a$. Expiratory reserve volume $(ERV)$ |
| $1$. It is the additional volume of air that can be inspired by a forcible inspiration. | $1$. It is the additional volume of air that can be expired by a forcible expiration. |
| $2$. It is about $2500-3500 \, mL$. | $2$. It is about $1000-1100 \, mL$. |
| $b$. Inspiratory capacity $(IC)$ | $b$. Expiratory capacity $(EC)$ |
| $1$. Total volume of air a person can inspire after a normal expiration. | $1$. Total volume of air a person can expire after a normal inspiration. |
| $2$. $IC = TV + IRV$ | $2$. $EC = TV + ERV$ |
| $c$. Vital capacity $(VC)$ | $c$. Total lung capacity $(TLC)$ |
| $1$. Maximum volume of air a person can breathe in after a forced expiration. | $1$. Total volume of air accommodated in the lungs at the end of a forced inspiration. |
| $2$. Includes $ERV + TV + IRV$. | $2$. Includes $RV + ERV + TV + IRV$. |
Explore More
| List-$I$ (Respiratory Volume) | List-$II$ (Capacity in mL) |
| $A$. $ERV$ (Expiratory Reserve Volume) | $I$. $2500-3000 \text{ mL}$ |
| $B$. $RV$ (Residual Volume) | $II$. $500 \text{ mL}$ |
| $C$. $IRV$ (Inspiratory Reserve Volume) | $III$. $1000-1100 \text{ mL}$ |
| $D$. $TV$ (Tidal Volume) | $IV$. $1100-1200 \text{ mL}$ |
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