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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
There are more sensory neurons in the tongue than in any other part of the body.
Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
There are approximately 3 million unintended pregnancies in the United States each year.
Hypertension is a silent killer because it is deadly and has no significant early symptoms. The danger from hypertension is the extra load on the heart, which can lead to hypertensive heart disease and kidney damage. This occurs without any major symptoms until the high blood pressure becomes extreme. Regular blood pressure checks are an important method of catching hypertension before it can kill you.