What Colour is healthy blood?
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Red blood is healthy. The color of blood is related to the amount of oxygen bound to the red blood cells. The more oxygen in the blood, the brighter red it appears.
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Blood in the human body is red regardless of how oxygen-rich it is, but the shade of red may vary. The level or amount of oxygen in the blood determines the hue of red. As blood leaves the heart and is oxygen-rich, it is bright red. When the blood returns to the heart, it has less oxygen.
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