There are more bacteria in your mouth than there are people in the world.
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Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
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Acetaminophen (Tylenol) in overdose can seriously damage the liver. It should never be taken by people who use alcohol heavily; it can result in severe liver damage and even a condition requiring a liver transplant.
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The horizontal fraction bar was introduced by the Arabs.
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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Common bandaging methods
Methods of removing urinary stones
Research Methods
Patient Teaching Methods Cont.
The Russians planted a flag on the sea floor beneath the North Pole
Some of the most commonly used radiometric dating methods