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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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Eat fiber! A diet high in fiber can help lower cholesterol levels by as much as 10%.
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Ether was used widely for surgeries but became less popular because of its flammability and its tendency to cause vomiting. In England, it was quickly replaced by chloroform, but this agent caused many deaths and lost popularity.
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Calcitonin is a naturally occurring hormone. In women who are at least 5 years beyond menopause, it slows bone loss and increases spinal bone density.
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In 1864, the first barbiturate (barbituric acid) was synthesized.