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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.

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Essential fatty acids have been shown to be effective against ulcers, asthma, dental cavities, and skin disorders such as acne.

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Approximately 500,000 babies are born each year in the United States to teenage mothers.

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Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

John F. Kennedy, comfortable and assured, was more telegenic than Richard M. Nixon in the 1960 ... John F. Kennedy, comfortable and assured, was more telegenic than Richard M. Nixon in the 1960 ...
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Video: Electrical Conduction System of the Heart

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