As shown in, the hepatic artery delivers oxygenated blood from the heart to the liver. These two vessels, along with the common hepatic duct, run behind the lateral border of the lesser omentum on the way to their destinations. The porta hepatis (“gate to the liver”) is where the hepatic artery and hepatic portal vein enter the liver. The lesser omentum tethers the liver to the lesser curvature of the stomach. The falciform ligament and ligamentum teres hepatis are actually remnants of the umbilical vein, and separate the right and left lobes anteriorly. These are the falciform ligament, the coronary ligament, two lateral ligaments, and the ligamentum teres hepatis. The liver is connected to the abdominal wall and diaphragm by five peritoneal folds referred to as ligaments. In the right lobe, some anatomists also identify an inferior quadrate lobe and a posterior caudate lobe, which are defined by internal features. The liver is divided into two primary lobes: a large right lobe and a much smaller left lobe. The liver lies inferior to the diaphragm in the right upper quadrant of the abdominal cavity and receives protection from the surrounding ribs. In addition to being an accessory digestive organ, it plays a number of roles in metabolism and regulation.
It is also one of the most important organs. The liver is the largest gland in the body, weighing about three pounds in an adult. The liver, pancreas, and gallbladder are considered accessory digestive organs, but their roles in the digestive system are vital.
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