Answers

2014-06-06T18:14:26+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 -> Alveoliand the exchange of air will happen here.
3 3 3