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27 February, 19:16

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. 27 February, 19:55
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    B. the presence of oxygen-bound hemoglobin makes it bright red
  2. 27 February, 21:16
    0
    There is more oxygen near the lungs, because fresh oxygen goes into the lungs.
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