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Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
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Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.
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On average, the stomach produces 2 L of hydrochloric acid per day.
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Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.
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The familiar sounds of your heart are made by the heart's valves as they open and close.