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Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Did you know?
The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.
Did you know?
There are approximately 3 million unintended pregnancies in the United States each year.
Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
Did you know?
Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.