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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?
The average adult has about 21 square feet of skin.
Did you know?
People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.
Did you know?
Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.
Did you know?
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.


