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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
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Medication errors are more common among seriously ill patients than with those with minor conditions.
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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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The average older adult in the United States takes five prescription drugs per day. Half of these drugs contain a sedative. Alcohol should therefore be avoided by most senior citizens because of the dangerous interactions between alcohol and sedatives.
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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.