PHOTOS: Go Inside the Human Body!

Revolutionary technology offers never-before-seen views of our bodies at work.

The Ultimate Machine: From Birth to Death

Inside the Living Body
Inside the Living Body
Inside the Living Body
Inside the Living Body
Inside the Living Body
Inside the Living Body
Inside the Living Body
Inside the Living Body
Inside the Living Body
Inside the Living Body
Inside the Living Body
Inside the Living Body
A close-up of a man's internal organs, including the liver. The liver performs more than 500 functions. One of them is to convert poisons, such as alcohol, into harmless chemicals. This process demands water, some of which comes from the brain. Water and essential salts are pulled from the brain, which then shrinks away from the skull. This causes a particular kind of headache — a hangover. (National Geographic Channel)
Slideshows
ABC News on Facebook