why is there extra air in our lungs after exhaling
Asked by Shagun Rastogi | 5th Jun, 2014, 11:33: AM
Extra air is necessary for our lungs because it keep our lungs from collapsing and becoming useless. This extra air is called as residual volume.
Answered by Sivanand Patnaik | 6th Jun, 2014, 08:34: AM
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