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Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.
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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 average adult has about 21 square feet of skin.
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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.