CBSE Class 10 Answered
why is there extra air in our lungs after exhaling
Asked by Shagun Rastogi | 05 Jun, 2014, 11:33: AM
Expert Answer
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 | 06 Jun, 2014, 08:34: AM
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