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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
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.
After a vasectomy, it takes about 12 ejaculations to clear out sperm that were already beyond the blocked area.
Walt Disney helped combat malaria by making an animated film in 1943 called The Winged Scourge. This short film starred the seven dwarfs and taught children that mosquitos transmit malaria, which is a very bad disease. It advocated the killing of mosquitos to stop the disease.
There are 20 feet of blood vessels in each square inch of human skin.