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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
Earwax has antimicrobial properties that reduce the viability of bacteria and fungus in the human ear.
Blood is approximately twice as thick as water because of the cells and other components found in it.
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).