 So this section is going to be demonstration of the entire billiary system. We have the abdomen in front of us This is the supine cadaver. This is the right side. This is the left side The camera person is on the right side towards the foot edge. This structure which I picked up here This is the common vial duct. We are going to start from distal and go to proximal. This is the diodenum and We have opened up the diodenum here and my probe has now gone into the Hepatopancreatic ampulla and we can see that it is pushing into the Main pancreatic duct of virso and we can feel the probe here. Normally this opening is not so big But in this case we can see that my little finger is also going in And when I push my probe a little upward direction, we can see that it is now coming to the common vial duct here So this is the common vial duct which is entry onto the posterior aspect of the head of the pancreas and We have split the head of the pancreas in the posterior aspect And we can see the common vial duct going. So now let's trace the common vial duct the common vial duct runs in the Right free margin of the hepatodermal ligament which extends from the first part of the diodenum to the liver and as it goes up the common vial duct divides into a right hepatic duct and Left hepatic duct and we can see that here. And once it goes into the liver it divides into multiple Biliri radicals We yet we see one more duct here. This is the remnant of the cystic duct This patient has already undergone colocystectomy and we can see the clip that they have applied on the cystic duct There is no ball ride So this is the remnant of the cystic duct once the cystic duct opens into the common hepatic duct Then the rest of it has become known as the common vial duct. So this is the full course Let's come to the blood supply of the biliri system This is the celiac trunk and we can see this branch coming out This is the hepatic artery The common hepatic artery is the second largest branch of the celiac trunk and the common hepatic artery as it's traveling To the right it gives off a big branch and that we can see here This is the gastrodural artery and after that the common hepatic artery makes an upward bend and it becomes known as the Hepatic artery proper in this case. We can see not one but two hepatic arteries So we would say that this is the right hepatic artery and this is the left hepatic artery From the right hepatic artery We know we have the cystic artery coming out and so we would say that since this patient is already undergone colocystectomy This is the remnant of the cystic artery and we can see again yet another clip Which was applied to the cystic artery Additionally, we can see that there's yet one more branch which is going into the liver So therefore the common hepatic artery is not one but three here one here One here and one here and this is the remnant of the cystic artery So this cystic artery runs in the calore strangle So if the calore strangle had been present then the calore strangle is formed by one margin by the cystic duct another margin by the common hepatic duct and the other margin by the liver and One of the contents of the calore strangle is the cystic artery Which would have been present here and the gallbladder fossa is this one here and we can see that the gallbladder fossa is empty So therefore this patient has undergone colocystectomy. Let's mention a few important clinical correlations to the biliary system We can cannulate like where my probe has gone in by means of an endoscope and we can inject a radiocopic dye And that way we can outline the entire pancreatic system and we can outline the entire biliary system That is known as endoscopic retrograde cholangio pancreatogram Another investigation that is done after surgery especially after common bile duct exploration in the case of stones in the common bile duct We can put in a tube a t-tube inside the common bile duct The short limb of the t-tube will be here and the long limb will comes out through the domain here 14 days after surgery we can inject radiocopic contrast to see if the whole passage is patient and if it is patient We can pull out the tube that procedure is referred to as t-tube cholangio gram That is another investigation which is done after surgery I can mention one more clinical condition that seems to be present in this particular patient We notice that this patients the diodenum is highly dilated and we have opened up the diodenum And we also notice that she had diodenal diverticulum and my finger has gone into one of the diverticulum here In this connection I can mention a syndrome, which is not very common though that is known as lemel syndrome a Periampillary diodenal diverticulum can compress the intra pancreatic portion of the common bile duct and can produce dilatation of the common bile duct Approximately and can lead to obstructive jaundice and that condition is known as lemel syndrome We are not sure whether this patient has lemel syndrome or not But we can see that the common bile duct appears to be dilated So this is what we notice about the entire biliary system in this particular cadaver We thank you very much for watching if you have any questions or comments Please put them in the comment section below dr. Sanjay Sanyal sunny out. Have a nice day