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We have a number of gases available around our body. Then why does our nose sense and accept only oxygen gas to inhale inside?

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Question added by Amal Brahmi , Primary teacher , Ajyal Alghad
Date Posted: 2014/04/29
Mohammad Taki
by Mohammad Taki , Head Of Math Department - Math Teacher , Safir High School

Because it is responsible for combustion ... It is the need of the body to survive

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