Each square inch of human skin consists of twenty feet of blood vessels. Every human spent about half an hour as a single cell. Every person has a unique tongue print. Every square inch of the human body has an average of 32 million bacteria on it. Fingernails grow faster than toenails.
Fingerprints serve a function - they provide traction for the fingers to grasp things.
Humans shed about 600,000 particles of skin every hour - about 1.5 pounds a year. By 70 years of age, an average person will have lost 105 pounds of skin. Humans shed and regrow outer skin cells about every 27 days - almost 1,000 new skins in a lifetime. If it were removed from the body, the small intestine would stretch to a length of 22 feet. If you are locked in a completely sealed room, you will die of carbon dioxide poisoning first before you will die of oxygen deprivation.