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Did you know?
The familiar sounds of your heart are made by the heart's valves as they open and close.
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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
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Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
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The longest a person has survived after a heart transplant is 24 years.