NEET2008ZoologyBreathing and Exchange of GasesActual
What is vital capacity of our lungs?
Options
- AInspiratory reserve volume plus tidal volume
- BTotal lung capacity minus expiratory reserve volume
- CInspiratory reserve volume plus expiratory reserve volume
- DTotallung capacity minus residual volume
Correct answer
D. Totallung capacity minus residual volume
Step-by-step solution
Vital capacity is the sum of inspiratory reserve volume, tidal volume and expiratory reserve volume. It is about 4800 ~mL . Total lung capacity is the sum of vital capacity and residual volume, ie, vital capacity of our lungs is total lung capacity minus residual volume. Tidal volume is the amount of air, which normally passes into and out of the lungs during each cycle of quit breathing. It is about 800 ~mL in adult person. Inspiratory reserve volume is the extra volume of air that can be inhaled into lungs during