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Did you know?
When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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People about to have surgery must tell their health care providers about all supplements they take.
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There are more nerve cells in one human brain than there are stars in the Milky Way.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.