The liver is considered as the largest internal organ. The liver plays a role in filtration. It acts as a filter of the body. All blood theat leaves the stomach and intestines passes through the liver. It detoxifies the blood. It also acts on digestion. It make and secrete bile that are responsible for the purification of blood coming from the small intestines. Liver is an important organ responsible for making proteins.
Liver is acts on the metabolism of fat. The liver cells break down fats to produce energy. This is happening during fasting state of an individual. Half the fat from a meal is being burned for energy. The rest is stored to adipose tissue until it is needed during fasting.