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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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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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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Sperm cells are so tiny that 400 to 500 million (400,000,000–500,000,000) of them fit onto 1 tsp.
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More than 4.4billion prescriptions were dispensed within the United States in 2016.
