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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
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Your heart beats over 36 million times a year.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.