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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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Illicit drug use costs the United States approximately $181 billion every year.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.
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Critical care patients are twice as likely to receive the wrong medication. Of these errors, 20% are life-threatening, and 42% require additional life-sustaining treatments.
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Urine turns bright yellow if larger than normal amounts of certain substances are consumed; one of these substances is asparagus.