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Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
Bacteria have flourished on the earth for over three billion years. They were the first life forms on the planet.
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).
Cyanide works by making the human body unable to use oxygen.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.