Answers

2014-08-07T19:17:12+05:30
We inhale all other gases in air but when it enters lungs there the bronchioles takes oxygen only and it will be absorbed by haemoglobin in blood. other gases are exhaled out.
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  • Brainly User
2014-08-07T19:18:45+05:30
We donot breathe only oxygen there are also other gases like carbondioxide when we breathe
so it will be a wrong saying tht we only breathe oxygen
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this is proved that we breathe only oxygen