Cystic duct

Cystic 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 7: Inferior vena cava 8: Common bile duct 9: Hepatic artery 10: Portal vein 11: Cystic duct 12: Hepatic duct 13: Gallbladder
Details
Artery	cystic artery
Identifiers
Latin	ductus cysticus
TA	A05.8.02.011
FMA	14539
Anatomical terminology [edit on Wikidata]

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. 15. Pancreas: 16: Accessory pancreatic duct, 17: Pancreatic duct.
18. Small intestine: 19. Duodenum, 20. Jejunum
21–22: 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 cystic duct is the short duct that joins the gallbladder to the common bile duct. It usually lies next to the cystic artery. It is of variable length. It contains 'spiral valves of Heister,' which do not provide much resistance to the flow of bile.

Function

Bile can flow in both directions between the gallbladder and the common hepatic duct and the (common) bile duct.

In this way, bile is stored in the gallbladder in between meal times. 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.

Clinical significance

Gallstones can enter and obstruct the cystic duct, preventing the flow of bile. The increased pressure in the gallbladder leads to swelling and pain. This pain, known as biliary colic, is sometimes referred to as a gallbladder "attack" because of its sudden onset.

During a cholecystectomy, the cystic duct is clipped two or three times and a cut is made between the clips, freeing the gallbladder to be taken out.

See also

• Accessory bile duct

Additional images

• 

  Digestive system diagram showing the cystic duct

• 

  The gall-bladder and bile ducts laid open.

• 

  The portal vein and its tributaries.

• 

  Cystic duct.Visceral surface of liver.

References

External links

• Anatomy figure: 38:06-03 at Human Anatomy Online, SUNY Downstate Medical Center - "The gallbladder and extrahepatic bile ducts."
• Anatomy photo:38:14-0106 at the SUNY Downstate Medical Center - "Stomach, Spleen and Liver: The Gallbladder and the Bile System"
• liver at The Anatomy Lesson by Wesley Norman (Georgetown University) (liverinferior, biliarysystem)