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Did you know?
The human body produces and destroys 15 million blood cells every second.
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 term bacteria was devised in the 19th century by German biologist Ferdinand Cohn. He based it on the Greek word "bakterion" meaning a small rod or staff. Cohn is considered to be the father of modern bacteriology.
Did you know?
Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
Did you know?
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.