Cystic duct

Cystic Duct

The Cystic Duct is a critical component of the human biliary system, which is responsible for the production and transportation of bile. The cystic duct connects the gallbladder to the common bile duct, and it plays a crucial role in the digestion of fats.

Anatomy

The cystic duct is typically 2-4 cm long and has a diameter of about 5 mm. It begins at the neck of the gallbladder and ends at the common bile duct. The interior of the cystic duct is lined with a series of crescent-shaped folds known as the spiral valves of Heister. These valves prevent the collapse or over-distension of the duct.

Function

The primary function of the cystic duct is to transport bile between the gallbladder and the common bile duct. When food enters the small intestine, the hormone cholecystokinin is released, causing the gallbladder to contract and the sphincter of Oddi to relax. This allows bile to flow through the cystic duct and into the small intestine, where it aids in the digestion of fats.

Disorders

Disorders of the cystic duct can lead to a variety of medical conditions. For example, gallstones can form in the gallbladder and become lodged in the cystic duct, causing cholecystitis or inflammation of the gallbladder. Other potential disorders include cystic duct syndrome and biliary dyskinesia, both of which can cause abdominal pain and other digestive symptoms.

Treatment

Treatment for disorders of the cystic duct typically involves surgery to remove the gallbladder, a procedure known as a cholecystectomy. This can be performed using open surgery or a less invasive technique known as laparoscopic surgery. In some cases, medication may be used to dissolve gallstones and clear blockages in the cystic duct.

See Also

• Biliary system
• Gallbladder
• Common bile duct
• Cholecystitis
• Cholecystectomy

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  Illustration of liver and gallbladder

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  Digestive system showing bile duct

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  Gray's anatomy illustration of gall bladder

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  Diagram of bile bladder

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  Histological slide of gallbladder