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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.
The B-complex vitamins and vitamin C are not stored in the body and must be replaced each day.
The longest a person has survived after a heart transplant is 24 years.
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