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Not getting enough sleep can greatly weaken the immune system. Lack of sleep makes you more likely to catch a cold, or more difficult to fight off an infection.

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By definition, when a medication is administered intravenously, its bioavailability is 100%.

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The highest suicide rate in the United States is among people ages 65 years and older. Almost 15% of people in this age group commit suicide every year.

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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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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).

The Dan Flavin Art Institute, Bridgehampton, New York. The Dan Flavin Art Institute, Bridgehampton, New York.
Louis H. Sullivan, Bayard-Condict Building (detail), New York. Louis H. Sullivan, Bayard-Condict Building (detail), New York.
Louis Comfort Tiffany, Tiffany Glass & Decorating Co. (1893–1902), Corona, New York, Peacock ... Louis Comfort Tiffany, Tiffany Glass & Decorating Co. (1893–1902), Corona, New York, Peacock ...
Firm handshake Firm handshake
Management Information Systems: Managing the Digital Firm, 15th Edition Management Information Systems: Managing the Digital Firm, 15th Edition
US Airways Flight 1549 floats in New York’s Hudson River after collisions with geese incapacitated ... US Airways Flight 1549 floats in New York’s Hudson River after collisions with geese incapacitated ...
Video: Mechanisms of capillary exchange

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