The Liver is the largest internal organ of the body. It has an average weight of 3.5 pounds and is soft and pinkish-brown in color. It is covered by a membrane called visceral peritoneum which lessens the friction with the other organ. The main function of the liver is to cleanse the blood. It detoxifies about 600 liters of blood daily. If the liver is not functioning properly all and every foods can be poisonous to the body.