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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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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.
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Excessive alcohol use costs the country approximately $235 billion every year.
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Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
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Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.