by Jason Wasserman MD PhD FRCPC
May 9, 2022
The gallbladder is a small, pear-shaped organ located below the liver, in the right, upper portion of the abdomen. Doctors often describe this area as the right, upper quadrant.
The gallbladder is a hollow organ that stores bile, a specialized fluid made in the liver. Bile aids in digestion and is typically released from the gallbladder after a meal. The gallbladder releases bile by contracting.
The wall of the gallbladder is made up of a thick bundle of muscle that allows the gallbladder to contract. This contraction pushes bile out of the gallbladder and down a tube called the cystic duct and then into a part of the small bowel called the duodenum.
The inside of the gallbladder is lined with a thin layer of tissue called mucosa. The surface of the mucosa is covered with epithelial cells that form a barrier called the epithelium. Below the epithelium is a thin layer of connective tissue called lamina propria.