Why and how nose only intake oxygen from air ???
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nose takes in all gases from the atmosphere... not just oxygen.... it is just that the % of oxygen intake is greater than the % exhaled
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who says?
nose takes up all gases
but only O2 is dissolved bcz it reacts with haemoglobin
however other alse reacts
nose takes up all gases
but only O2 is dissolved bcz it reacts with haemoglobin
however other alse reacts
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