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OpenStudy (anonymous):
From which structures do oxygen immediately enter the blood system ? A. alveoli B. bronchi C. veins D. nostrils
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OpenStudy (anonymous):
Why are you posting biology questions in the math section? Lol
OpenStudy (anonymous):
because nobody answers in biology:)
OpenStudy (anonymous):
No one answers here, either.
OpenStudy (anonymous):
yes huh
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