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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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Your heart beats over 36 million times a year.
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The first war in which wide-scale use of anesthetics occurred was the Civil War, and 80% of all wounds were in the extremities.
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Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.
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Illicit drug use costs the United States approximately $181 billion every year.