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Hemoglobin changes color according to what it is bound to. When it is oxygenated, it is closer to bright red. When it is carrying carbon dioxide, it is darker red or brown. When it is carrying carbon monoxide, it is also quite bright red.
Wiki User
∙ 12y ago
Wiki User
∙ 12y agoHemoglobin. Hemoglobin is the part of a red blood cell that carries oxygen. It is an iron based compound. The more oxygen saturated hemoglobin becomes, the redder the blood becomes.
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