unicornpoop1234566 unicornpoop1234566

17-02-2017
Health

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oxygen enters the blood in the ...?

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Helloboi Helloboi

17-02-2017

Oxygen enters the lungs, then passes through the alveoli and into the blood.

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Аноним Аноним

17-02-2017

Oxygen enters the blood in the "Lungs"(Through Alveoli)

Hope this helps!

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