The most authoritative answer in 2024
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Benjamin Davis——Works at the International Renewable Energy Agency, Lives in Abu Dhabi, UAE.
As a subject matter expert in biology and physiology, I can tell you that the color of oxygen-poor blood, also known as venous blood, is typically a darker shade of red. This is because it contains less oxygen and more carbon dioxide, which alters the color due to the different levels of oxygenation of the hemoglobin within the red blood cells.
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Julian Walker——Works at the International Fund for Agricultural Development, Lives in Rome, Italy.
Blood in your veins has very little oxygen and is a dark red color that looks almost blue when covered by your skin. Your arteries have bright red blood because it has a lot of oxygen in it that is being carried throughout your body to be used by tissues.read more >>
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