The document provides facts about various parts of the human body including blood, the brain, eyes, hair, and skin. Some key facts are that blood circulates through the entire body in about 20 seconds, the brain cannot feel pain itself, women blink twice as much as men, and after death the body dries out making hair and nails appear longer. The document aims to dispel common misconceptions as well, such as cracking knuckles does not cause arthritis.