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Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

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The Romans did not use numerals to indicate fractions but instead used words to indicate parts of a whole.

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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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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.

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The familiar sounds of your heart are made by the heart's valves as they open and close.

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