Answers

2016-06-21T08:02:05+08:00
The pathway of oxygen breathing :

The air will enter through the Nose -> and will pass Nasal passages for the filtering,moistening,and warming of the air -> down to Trachea -> that will go to theBronchi  -> which will go to the Bronchioles for the distribution of air to each -> Alveoli and the exchange of air will happen here.
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