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OpenStudy (readergirl12):
In which part of the human respiratory system does actual oxygen exchange take place? A. bronchi B. trachea C. diaphragm D. alveoli Nobody is helping in Bio.. ;-;
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OpenStudy (electronia):
A.
OpenStudy (gabebae):
No it's D
OpenStudy (gabebae):
100% sure it's alveoli
OpenStudy (electronia):
Your right. Sorry.
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