ICSE Class 9 Answered
(a) Name the instrument used to measure the volume of air in the lungs and the rate at which air is being exchanged.
(b) Explain briefly:
(1) Tidal volume
(2) Vital capacity
(3) Residual volume
(4) Inspiratory reserve volume
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
(a) Spirometer
(b)
(1) Tidal volume: Air breathed in and out, in a normal quiet breathing (500 mL)
(2) Vital capacity: Volume of air that can be taken in and expelled out by maximum inspiration and expiration (4500 mL)
(3) Residual volume: Air left in the lungs, even after forcible expiration (1500 mL)
(4) Inspiratory reserve volume: Air that can be drawn in forcibly over and above the tidal air (3000 mL)
Answered by | 04 Jun, 2014, 03:23: PM
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