Gallbladder

In vertebrates , the gallbladder is a small hollow organ where bile is stored and concentrated before it is released into the small intestine . In humans, the pear-shaped gallbladder lies beneath the liver , although the structure and position of the gallbladder can vary significantly among animal species. It receives and stores bile, produced by the liver, via the common hepatic duct and releases it via the common bile duct into the duodenum , where the bile helps in the digestion of fats .