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Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.
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).
The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
The familiar sounds of your heart are made by the heart's valves as they open and close.