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In most cases, kidneys can recover from almost complete loss of function, such as in acute kidney (renal) failure.
Amoebae are the simplest type of protozoans, and are characterized by a feeding and dividing trophozoite stage that moves by temporary extensions called pseudopodia or false feet.
Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.
For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.