15 interesting facts about the human heart
The heart. our engine, our motive force, our pump.
Here are 15 interesting facts about the human heart:
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Early start : The human heart starts beating about 22 days after fertilization , often before the mother knows she is pregnant.
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Heart rate frequency : An average adult heart beats about 100,000 times a day , which amounts to such a 35 million strokes per year .
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