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Did you know?
Vaccines prevent between 2.5 and 4 million deaths every year.
Did you know?
There are more sensory neurons in the tongue than in any other part of the body.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
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.
Did you know?
In ancient Rome, many of the richer people in the population had lead-induced gout. The reason for this is unclear. Lead poisoning has also been linked to madness.