Common bile duct

Common bile duct
Common bile duct
Digestive system showing bile duct.png
Digestive system diagram showing the common bile duct
Latin ductus choledochus
Gray's subject #250 1198
1. Bile ducts: 2. Intrahepatic bile ducts, 3. Left and right hepatic ducts, 4. Common hepatic duct, 5. Cystic duct, 6. Common bile duct, 7. Ampulla of Vater, 8. Major duodenal papilla
9. Gallbladder, 10-11. Right and left lobes of liver. 12. Spleen.
13. Esophagus. 14. Stomach. Small intestine: 15. Duodenum, 16. Jejunum
17. Pancreas: 18: Accessory pancreatic duct, 19: Pancreatic duct.
20-21: Right and left kidneys (silhouette).
The anterior border of the liver is lifted upwards (brown arrow). Gallbladder with Longitudinal section, pancreas and duodenum with frontal one. Intrahepatic ducts and stomach in transparency.

The common bile duct (ductus choledochus) is a tube-like anatomic structure in the human gastrointestinal tract. It is formed by the union of the common hepatic duct and the cystic duct (from the gall bladder). It is later joined by the pancreatic duct to form the ampulla of Vater. There, the two ducts are surrounded by the muscular sphincter of Oddi.

When the sphincter of Oddi is closed, newly synthesized bile from the liver is forced into storage in the gall bladder. When open, the stored and concentrated bile exits into the duodenum. This conduction of bile is the main function of the common bile duct. The hormone cholecystokinin, when stimulated by a fatty meal, promotes bile secretion by increased production of hepatic bile, contraction of the gall bladder, and relaxation of the Sphincter of Oddi.

Several problems can arise within the common bile duct. If clogged by a gallstone, a condition called choledocholithiasis can result. In this clogged state, the duct is especially vulnerable to an infection called ascending cholangitis. Very rare deformities of the common bile duct are cystic dilations (4 cm), choledochoceles (cystic dilation of the ampula of Vater (3–8 cm)), and biliary atresia.

Additional images

  • S.E.Miederer et al.:Endoscopic transpapillary splitting of a choledochocele. Dtsch Med. Wochenschr. 1978 Feb.3:103(5):216,219. PMID 631041

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Look at other dictionaries:

  • common bile duct — n the duct formed by the union of the hepatic and cystic ducts and opening into the duodenum called also ductus choledochus * * * ductus choledochus …   Medical dictionary

  • common bile duct — noun a duct formed by the hepatic and cystic ducts; opens into the duodenum • Syn: ↑bile duct • Hypernyms: ↑duct, ↑epithelial duct, ↑canal, ↑channel • Part Holonyms: ↑liver …   Useful english dictionary

  • common bile duct — noun the duct which is common to the cystic duct (coming from the gall bladder) and the hepatic duct (coming from the liver), which can be blocked by gallstones coming from the liver …   Australian-English dictionary

  • common bile duct — Carries bile from the liver and gallbladder into the duodenum (the upper part of the small intestine) …   English dictionary of cancer terms

  • Common hepatic duct — 1: Right lobe of liver 2: Left lobe of liver 3: Quadrate lobe of liver 4: Round ligament of liver 5: Falciform ligament 6: Caudate lobe of liver …   Wikipedia

  • bile duct — n a duct by which bile passes from the liver or gallbladder to the duodenum * * * any of the ducts that convey bile from the liver. Bile is drained from the liver cells by many small ducts that unite to form the main bile duct of the liver, the… …   Medical dictionary

  • Bile duct — Infobox Anatomy Name = PAGENAME Latin = GraySubject = GrayPage = Caption = Digestive system diagram showing the bile duct Caption2 = An intraoperative cholangiogram, which is an X Ray of the bile ducts during a laprascopic cholecystectomy System …   Wikipedia

  • bile duct — noun a duct formed by the hepatic and cystic ducts; opens into the duodenum • Syn: ↑common bile duct • Hypernyms: ↑duct, ↑epithelial duct, ↑canal, ↑channel • Part Holonyms: ↑liver …   Useful english dictionary

  • bile duct — any of the ducts that convey bile from the liver. Bile is drained from the liver cells by many small ducts into the right and left hepatic ducts, which unite to form the main bile duct of the liver, the common hepatic duct. This joins the cystic… …   The new mediacal dictionary

  • bile duct — bile′ duct n. anat. a common duct that transports bile from the liver and gall bladder to the small intestine • Etymology: 1765–75 …   From formal English to slang

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