胆囊，是位于右方肋骨下肝脏后方的梨形囊袋构造，有浓缩和保存胆汁之用。

胆囊是一个有弹性的梨形囊袋。胆囊内的单层柱状上皮细胞会分泌出粘液，构成粘膜。保护胆囊内壁免受胆汁腐蚀。

In vertebrates the gallbladder (also gall bladder, biliary vesicle or cholecyst), is a small organ where bile (a fluid produced by the liver) is stored and concentrated before it is released into the small intestine. Humans can live without a gallbladder. The surgical removal of the gallbladder is called a cholecystectomy.