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28 September, 21:40

Why is the blood that flows from the lungs toward the heart a brighter red than the blood that flows the other direction?

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  1. 28 September, 22:08
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    B. the presence of oxygen-bound hemoglobin makes it bright red
  2. 28 September, 23:35
    0
    There is more oxygen near the lungs, because fresh oxygen goes into the lungs.
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