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Is Deoxygenated Human Blood Blue? Some animals have blue blood. People only have crimson blood. It's a surprisingly widespread misconception that deoxygenated human blood is blue. Human blood is red because it accommodates numerous crimson blood cells, which include hemoglobin. Hemoglobin is a purple-coloured, iron-containing protein that capabilities in oxygen transport by reversibly binding to oxygen. Oxygenated hemoglobin and blood are brilliant pink; deoxygenated hemoglobin and blood are darkish red. Human blood does not seem blue under any circumstances. Vertebrate blood, typically, is pink. An exception is skink blood (genus Prasinohaema), which comprises hemoglobin yet seems inexperienced as a result of it comprises a large amount of the protein biliverdin. While your blood never truly turns blue, your skin can take on a bluish cast because of certain diseases and disorders. This blue colour known as cyanosis. If the heme in hemoglobin turns into oxidized, it could become methemoglobin, which is brownish.
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