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There are 60,000 miles of blood vessels in every adult human.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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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.
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Medication errors are three times higher among children and infants than with adults.
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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.