Illicit drug use costs the United States approximately $181 billion every year.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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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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On average, the stomach produces 2 L of hydrochloric acid per day.
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
The carbon cycle. Numbers are storage as 1015 g or fluxes as 1015 g per year (data from Schlesinger
Medical Language
If their caregivers sign to them, deaf children will imitate these signs and “babble” in sign, ...
Photo of a sign taken at an emissions test facility.
PMDD Diagnostic Criteria from the American Psychiatric Association