why is there extra air in our lungs after exhaling

Asked by Shagun Rastogi | 5th 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 | 6th Jun, 2014, 08:34: AM