cystic duct

anatomy

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Last updated

June 25, 2026

Quick Summary

The cystic duct is a crucial part of the biliary tract, connecting the gallbladder to the common bile duct. This duct plays a vital role in digestion by storing and concentrating bile produced by the liver. Bile aids in the breakdown of fats in the small intestine.

The cystic duct, along with the hepatic ducts, forms the common bile duct, which empties into the duodenum. When the small intestine is empty, a sphincter closes, forcing bile from the common duct into the cystic duct and gallbladder for storage. Upon the presence of food, the gallbladder contracts, and bile is released into the duodenum to assist in fat digestion. Disorders like gallstones can affect the gallbladder and its associated ducts.12

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human digestive system
Anatomy
The cystic duct varies from 2 to 3 cm in length and terminates in the gallbladder, a saccular structure with a capacity of about 50 ml (about 1.5 fluid ounces). Throughout its length, the cystic duct is lined by a spiral mucosal elevation, called the valvula…
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The cystic duct varies from 2 to 3 cm in length and terminates in the gallbladder, a saccular structure with a capacity of about 50 ml (about 1.5 fluid ounces). Throughout its length, the cystic duct is lined by a spiral mucosal elevation, called the valvula…
Read More