QS Study

Parts of Biliary Apparatus

Biliary Apparatus Structures concerned with secretion and excretion of bile; includes liver, gallbladder, and hepatic, cystic, and common bile ducts. The biliary tract includes the gallbladder and bile ducts inside and outside the liver.

(A) Infra hepatic part:

(1) Bile canaliculi – two half-canaliculi formed by the hepatocytes facing the perisinusoidal space

(2) Canals of Hering – they are part of the outflow system of exocrine bile product from the liver.

(3) Bile ductile – They are part of the outflow system of exocrine bile product from the liver.

(4) Right and left hepatic ducts – These ducts are formed by the intrahepatic ducts and are a part of a ductal system that leads to the gallbladder.

Fig: Parts of Biliary Apparatus

(B) Extrahepatic part:

(1) Common hepatic duct- It is formed by union of right and left hepatic ducts near the right end of porta hepatis. It is 3cm, in length and is joined by cystic duct to form common bile duct (CBD).

(2) Gallbladder – It is a pear-shaped fibromuscular sac that stores and concentrates bile. It lies in the gallbladder fossa on the inferior surface of the right lobe of the liver

(3) Cystic duct – It begins at the neck of the gallbladder and joins the common hepatic duct to form CED. The mucous membrane has spirally arranged 5-12 crescentic folds.

(4) Common bile duct – It is approximately 8 cm long and 6 mm wide. It is formed by union of common hepatic duct and cystic duct.

Related Study: