Gall Blader - What is gallbladder and what is its function in the body? Gallbladder is a pear shaped and sized bile bag, that is part of the biliary tree. It is connected to the bile tube coming from the liver. This bile tube is called common bile duct that joins with a tube coming from an organ called pancreas and opens in to a part of intestine called duodenum. The normal function of the gallbladder is to store the bile produced by the liver until a person eats and then the gallbladder muscles squeeze the bile in to the common bile duct to empty in to the duodenum, where it plays a part in the digestion of fatty food.