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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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Blood is approximately twice as thick as water because of the cells and other components found in it.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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Multiple sclerosis is a condition wherein the body's nervous system is weakened by an autoimmune reaction that attacks the myelin sheaths of neurons.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.