The familiar sounds of your heart are made by the heart's valves as they open and close.
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Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.
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Patients who have been on total parenteral nutrition for more than a few days may need to have foods gradually reintroduced to give the digestive tract time to start working again.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.
Regulation of heat exchange in the skin.
Overview of gas exchange between the environment, blood, and cells.
Gas exchange across body surfaces.
Gas exchange
Flexible exchange rates are supposed to prevent long-term trade deficits.
Main mechanism of carbon dioxide transport and exchange. A lesser amount of CO2 travels to the lungs