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Did you know?
In 1844, Charles Goodyear obtained the first patent for a rubber condom.
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Russia has the highest death rate from cardiovascular disease followed by the Ukraine, Romania, Hungary, and Poland.
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In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.
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Illness; diuretics; laxative abuse; hot weather; exercise; sweating; caffeine; alcoholic beverages; starvation diets; inadequate carbohydrate consumption; and diets high in protein, salt, or fiber can cause people to become dehydrated.
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The longest a person has survived after a heart transplant is 24 years.
![Lymphatic vessels (green) pick up excess tissue fluid, purify it in lymph nodes, and return it to th](https://biology-forums.com/gallery/47/medium_14755_10_09_12_7_17_45_85032206.jpeg)
![The urinary system: kidneys, ureters, bladder, and urethra with expanded view of a nephron and the u](https://biology-forums.com/gallery/47/medium_14755_05_10_12_4_15_35_92751702.jpeg)