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Did you know?
There are 60,000 miles of blood vessels in every adult human.
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Each year in the United States, there are approximately six million pregnancies. This means that at any one time, about 4% of women in the United States are pregnant.
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The human body produces and destroys 15 million blood cells every second.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.