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Egg cells are about the size of a grain of sand. They are formed inside of a female's ovaries before she is even born.
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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.
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Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.
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Patients who cannot swallow may receive nutrition via a parenteral route—usually, a catheter is inserted through the chest into a large vein going into the heart.
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In 1844, Charles Goodyear obtained the first patent for a rubber condom.