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OpenStudy (anonymous):

Help Please! What happens in the red blood cells in the lungs? A.Hemoglobin drops off oxygen and picks up carbon dioxide. B.Hemoglobin drops off carbon dioxide and picks up oxygen. C.Hemoglobin picks up both carbon dioxide and oxygen. D,Hemoglobin drops off both carbon dioxide and oxygen.

OpenStudy (anonymous):

When you breath, the gas exchange the occurs is the release of CO2 and the intake of O2.

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