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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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In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.
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Cocaine was isolated in 1860 and first used as a local anesthetic in 1884. Its first clinical use was by Sigmund Freud to wean a patient from morphine addiction. The fictional character Sherlock Holmes was supposed to be addicted to cocaine by injection.
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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").