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Did you know?

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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Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

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The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.

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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.

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Many medications that are used to treat infertility are injected subcutaneously. This is easy to do using the anterior abdomen as the site of injection but avoiding the area directly around the belly button.

Degree of genetic relatedness to self in a diploid organism. Degree of genetic relatedness to self in a diploid organism.
Yinka Shonibare MBE, Nelson's Ship in a Bottle, Fourth Plinth, Trafalgar Square, London. Yinka Shonibare MBE, Nelson's Ship in a Bottle, Fourth Plinth, Trafalgar Square, London.
Third-degree heart block. Third-degree heart block.
Hydrogen burns to produce energy and water Hydrogen burns to produce energy and water
Wavelengths that penetrate the earth's atmosphere Wavelengths that penetrate the earth's atmosphere
Fourth Leopold’s maneuver Fourth Leopold’s maneuver
Video: Properties of water -structure of water and polarity (Ionized and polar compounds)

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