Oxygen-poor blood is darker red in color.
How does oxygen change the color of the blood?
The color of the blood may be altered due to the concentration of oxygen in it. When the blood is released from the heart, it is oxygen-rich and bright red in color.
But when the blood arrives in the heart from other body parts, it is oxygen-poor and thus darker red in color.
Therefore, Oxygen-poor blood is darker red in color.
To learn more about Oxygenated blood, refer to the link:
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