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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 the Bronchi  -> which will go to the Bronchioles for the distribution of air to each -> Alveoli and the exchange of air will happen here.

Hope it Helps 
~ Jessamine ~
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Sure! What is the question??
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ano po ba ang antonyms nng Inflate?
describe blood flow and gas exchange within the heart, circulatory system and lungs.. paki sagot po please. .
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