Asked by matt

Need Help !
An instrument called a ________ is used to measure the volume of air that moves into and out of the lungs.
A. Hydrometer
B. Barometer
C. Spirometer
D. None of the above
I think its D , But Don't Wanna Get Wrong .
Answered by Ms. Sue
It's not D.

Please look up the meanings of those three words.

Answered by Alexis
C is the right answer because
The spirometer measures the air capacity of the lungs
Answered by Djones
C...spirometer
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