Hello, I'm a subject matter expert with a background in biology and physiology. When discussing the color of blood, it's important to understand the role of oxygen in determining its hue.
Blood that is
deoxygenated, or without oxygen, is typically a darker red color, often described as a
venous red or
maroon. This is because the oxygen-carrying protein in red blood cells,
hemoglobin, has a lower affinity for oxygen in the veins compared to the arteries. When hemoglobin releases oxygen to the body's tissues, it also picks up carbon dioxide, which changes its color to a darker shade.
So, the answer to your question is: **Blood without oxygen is a darker red color, often referred to as venous red or maroon.**
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