The mythical Titan Prometheus had ancient history's most famous liver problem. According to myth, Prometheus angered Zeus by favoring mortal men over the gods, even stealing fire from the gods and giving it to humankind. Zeus had him chained to a rock on Mount Caucasus, where an eagle preyed on his liver. Amazingly, for 30 long years the eagle returned each day to gnaw his liver. Yet, Prometheus survived, because his liver would regenerate during the nights. This is one of the many fascinating stories from Greek mythology. The interesting thing about this one is that it seems to suggest that the ancient Greeks knew that the liver can replace its damaged cells. If a part of the liver is removed the liver grows back to its original size.
The liver produces the greenish-yellow digestive juice called bile and performs more than 500 other jobs, some of them, essential to life. It weighs about 1.4 kg in an adult.