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Common bile duct

 

 
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Common bile duct
 
 
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Bile
Bile

Bile or gall is a bitter yellow or green fluid secreted by hepatocytes from the liver of most vertebrates. In many species, bile is stored in the gallbladder between meals and upon eating is discharged into the duodenum where the bile aids the process of digestion of lipids....
, which is synthesized in the liver, is carried via the right and left hepatic ducts, with both converging to form the common hepatic duct. The cystic duct opens at the lower end of the common hepatic duct forming the common bile duct. To put it in another way, the cystic duct enters the superior end of the common bile duct and the bile either empties into the second (descending) part of the duodenum at times of digestion, or enters the cystic duct to be stored in the gallbladder in the resting time as spincter oddi is contracted.






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Bile
Bile

Bile or gall is a bitter yellow or green fluid secreted by hepatocytes from the liver of most vertebrates. In many species, bile is stored in the gallbladder between meals and upon eating is discharged into the duodenum where the bile aids the process of digestion of lipids....
, which is synthesized in the liver, is carried via the right and left hepatic ducts, with both converging to form the common hepatic duct. The cystic duct opens at the lower end of the common hepatic duct forming the common bile duct. To put it in another way, the cystic duct enters the superior end of the common bile duct and the bile either empties into the second (descending) part of the duodenum at times of digestion, or enters the cystic duct to be stored in the gallbladder in the resting time as spincter oddi is contracted. The bile finds its route to the gallbladder via the cystic duct to be stored there at the gall bladder bag. Additionally, concentration of bile takes place at the gallbladder. The bile is to be released from this storage bag to the duodenum by secretion of cholycystokinin, a local hormone from duodenal mucosa, by a stimuli of passage of fatty meal in duodenum.

The inferior end of the common bile duct merges with the large pancreatic duct
Pancreatic duct

The pancreatic duct, or duct of Wirsung, is a duct joining the pancreas to the common bile duct to supply pancreatic juices which aid in digestion provided by the "exocrine pancreas"....
 (duct of Wirsung) from the pancreas
Pancreas

The pancreas is a gland Organ in the digestive system and endocrine system of vertebrates. It is both an endocrine gland , as well as an exocrine gland, secreting pancreatic juice containing Digestion enzymes that pass to the small intestine....
, into the ampulla of Vater. There, the two ducts are surrounded by the muscular hepatopancreatic sphincter (sphincter of Oddi
Sphincter of Oddi

The Sphincter of Oddi is a muscular valve that controls the flow of digestive juices through the ampulla of Vater into the second part of the duodenum ....
) which if contracted, prevents bile
Bile

Bile or gall is a bitter yellow or green fluid secreted by hepatocytes from the liver of most vertebrates. In many species, bile is stored in the gallbladder between meals and upon eating is discharged into the duodenum where the bile aids the process of digestion of lipids....
 from entering the small intestine. Very rare deformities of the common bile duct are cystic dilations (4 cm), choledochoceles (cystic dilation of the ampula vateri 3-8 cm,and in the descending part of the duodenum a intraluminal diverticular. S.E.Miederer splitted a choledochocele by the endoscopic route at the first time in 1976.

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


External links

- "The gallbladder and extrahepatic bile ducts."