The biliary tract is composed of the liver, bile ducts, and the gall bladder. Bile is made in the liver. It is then carried to the gall bladder via the bile ducts. The gall bladder stores the bile until it is ready to be released into the duodenum. Through molecular signalling from the small intestine, the gall bladder will contract and empty its contents into a larger bile duct that will end in the lumen of the small intestine.