Functions of the gall bladder

Bile from the liver passes through the cystic duct to the gall bladder. The gall bladder acts as a reservoir of bile. By the absorption of water, the bile is concentrated in gall bladder. When a meal is taken, the gall bladder contracts. Then the bile passes through the cystic duct again and then down the bile duct and enters the duodenum. Bile enters the duodenum only when the sphincter of oddi is relaxed.