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In a normal person, the heart beats 70 time a minute, 100,000 times a day, 40 million times a year! During a single day, a ventricle pumps about 11,000 quarts in a lifetime. If an elevator could be harnessed to this marvelous machine, you could ride from the ground floor to the fifth floor of a building in about an hour. No wonder Leonardo called it a "marvelous instrument.” – Julius Miller