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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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The term pharmacology is derived from the Greek words pharmakon("claim, medicine, poison, or remedy") and logos ("study").
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The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").
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After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
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Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.