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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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Oxygen enters the nose or mouth then goes to the nasal cavity where it is filtered, then to the pharynx or throat then larynx or voice box. It will go down through the trachea or windpipe then divided to two parts called bronchi and to other multiple smaller branches called bronchioles and the ending is alveoli where gas exchange occurs then lastly it is deliver by the blood to certain organs
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