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 climates, 8 to 10 glasses of water per day is recommended for adults. The best indicator for adequate fluid intake is frequent, clear urination.
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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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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
Current FDA Pregnancy Category Ratings with Examples