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A member asked:
What is the different between bright red and dark blood?
A doctor has provided 1 answer
Oxygenated vs : Un-oxygenated red cells. Red blood cells impart a bright red color when carrying oxygen; when these cells lose oxygen and pick up carbon dioxide, blood turns dark in color. There are other causes of different colors, e.g. Carbon monoxide poisoning, methemoglobinemia and variant hemoglobins.
Answered 12/15/2017
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