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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.
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The average office desk has 400 times more bacteria on it than a toilet.
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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 human body produces and destroys 15 million blood cells every second.
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A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.