Any pigmented compound in blood, especially hemoglobin and related colored substances that carry oxygen.
From 'hemo-' (blood) and 'chrome' (color, from Greek 'chroma'); a chemistry term from the 19th century describing the colored molecules that give blood its red appearance.
Hemochromes are why blood is red—the iron in hemoglobin gives blood its color, but other hemochromes like myoglobin in muscle tissue have slightly different colors that help scientists identify them!
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