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There are 20 feet of blood vessels in each square inch of human skin.
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
Patients should never assume they are being given the appropriate drugs. They should make sure they know which drugs are being prescribed, and always double-check that the drugs received match the prescription.
There are major differences in the metabolism of morphine and the illegal drug heroin. Morphine mostly produces its CNS effects through m-receptors, and at k- and d-receptors. Heroin has a slight affinity for opiate receptors. Most of its actions are due to metabolism to active metabolites (6-acetylmorphine, morphine, and morphine-6-glucuronide).