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Did you know?
Only 12 hours after an egg cell is fertilized by a sperm cell, the egg cell starts to divide. As it continues to divide, it moves along the fallopian tube toward the uterus at about 1 inch per day.
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There are 20 feet of blood vessels in each square inch of human skin.
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There are 60,000 miles of blood vessels in every adult human.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.
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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.