Trivia

[Magicman]

An average human body has 60,000 miles of blood vessels; they'd stretch around the earth twice if laid end to end. Every day, your heart pumps about 1,800 gallons of blood through your blood vessels. Over the course of a lifetime, this vast system carries about a million barrels of blood throughout the body. From the National Institute on Aging

Maybe you can add other health related trivia.