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There are 20 feet of blood vessels in each square inch of human skin.
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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.
Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.