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2015-06-16T19:29:22+08:00

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From the nose and mouth, the oxygen travels to the trachea, then to the bronchi, bronchioles, and lastly, to the alveoli.

--Mizu
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2015-06-20T20:13:29+08:00
From the nose or mouth ut goes to the pharynx then larynx and then trachea the to the lungs

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