What happens in the red blood cells in the lungs? Hemoglobin drops off oxygen and picks up carbon dioxide. Hemoglobin drops off carbon dioxide and picks up oxygen. Hemoglobin picks up both carbon dioxide

What happens in the red blood cells in the lungs?

Hemoglobin drops off oxygen and picks up carbon dioxide.
Hemoglobin drops off carbon dioxide and picks up oxygen.
Hemoglobin picks up both carbon dioxide and oxygen.
Hemoglobin drops off both carbon dioxide and oxygen.

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What happens in the red blood cells in the lungs? Hemoglobin drops off oxygen and picks up carbon dioxide. Hemoglobin drops off carbon dioxide and picks up oxygen. Hemoglobin pi…

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