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Author Question: When he is in school, Igor, who has Sickle cell anemia, is often tired when afternoon arrives. What ... (Read 2712 times)


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There are approximately 3 million unintended pregnancies in the United States each year.

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Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

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Hippocrates noted that blood separates into four differently colored liquids when removed from the body and examined: a pure red liquid mixed with white liquid material with a yellow-colored froth at the top and a black substance that settles underneath; he named these the four humors (for blood, phlegm, yellow bile, and black bile).

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