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Why is blood red?

Answer 1: Blood is red from the protein, hemoglobin. Hemoglobin has a molecule called a “heme” which has the metal iron in it. When the iron is oxygenated, it becomes red. When the iron is deoxygenated, it becomes darker red. Answer 2: Blood is red because of the hemoglobin inside our red blood cells. Hemoglobin […]

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