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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
In 1864, the first barbiturate (barbituric acid) was synthesized.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.
Did you know?
Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.