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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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Street names for barbiturates include reds, red devils, yellow jackets, blue heavens, Christmas trees, and rainbows. They are commonly referred to as downers.
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As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.
Chemical structure of lipids.
The Molecular Structure and Behavior of Lipids
Fats, Oils, and Other Lipids
Three Types of Lipids The three types of lipids vary in structure