why the human blood is red
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Human blood is red because hemoglobin, which is carried in the blood and functions to transport oxygen, is iron-rich and red in color. Octopuses and horseshoe crabs have blue blood. This is because the protein transporting oxygen in their blood, hemocyanin, is actually blue.
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humans blood is red because the hemoglobin is carried in a blood and functions to transport oxygen ,is icon- rich and red in color
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