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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.
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
Always store hazardous household chemicals in their original containers out of reach of children. These include bleach, paint, strippers and products containing turpentine, garden chemicals, oven cleaners, fondue fuels, nail polish, and nail polish remover.
Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
After 5 years of being diagnosed with rheumatoid arthritis, one every three patients will no longer be able to work.