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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
Many people have small pouches in their colons that bulge outward through weak spots. Each pouch is called a diverticulum. About 10% of Americans older than age 40 years have diverticulosis, which, when the pouches become infected or inflamed, is called diverticulitis. The main cause of diverticular disease is a low-fiber diet.
The lipid bilayer is made of phospholipids. They are arranged in a double layer because one of their ends is attracted to water while the other is repelled by water.
Nearly 31 million adults in America have a total cholesterol level that is more than 240 mg per dL.
About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.