A liver is the largest internal organ as well as largest gland of a human body. It is located below the diaphragm in the right side of the abdomen. It weighs around 3 pounds and is separated into two parts, right and left lobes. The liver is one of the most vital organs and plays an important part in the digestive system. Without the functions of the liver, a human being cannot survive. There are many important functions of a liver. These include the following: