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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
The average human gut is home to perhaps 500 to 1,000 different species of bacteria.
More than 20 million Americans cite use of marijuana within the past 30 days, according to the National Survey on Drug Use and Health (NSDUH). More than 8 million admit to using it almost every day.
Green tea is able to stop the scent of garlic or onion from causing bad breath.
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).