The liver is located in the upper right part of the abdomen, just below the diaphragm and weighs about 1.5 kilograms. The liver receives deoxygenated blood rich in nutrients from the intestines through the portal vein (vena portae). Oxygenated blood enters through the hepatic artery (hepatic artery). Once the blood has flowed through the liver, it is returned to the heart through the inferior vena cava (vena cava).
The liver is divided into a left and a right half. This division is made on the basis of the blood vessel supply. For example, the liver can be divided into eight pieces. We call these pieces segments. Figure 1 shows the liver with the segment distribution.