50 ZOOTOMY. 



95. Its passage anteriorly into the gall bladder, by the 

 short cystic duct (Fig. 15, c.d\ 



96. Its entrance posteriorly into the duodenum, im- 

 mediately behind the pylorus on the dorsal side. A bristle 

 should be passed into the duodenum through the cut end 

 of the duct. 



97. The junction with it of the two hepatic ducts, one (Fig. 15, 

 l.h.d) from the middle and left lobes, the other (r.k.d) from the right 

 lobe of the liver : the latter enterf the common bile duct close to its 

 junction with the liver, so that the cystic duct (c.d) is very short. 



XVIII. Dissect away the peritoneum from the pancreas, and 

 make out 



98. The pancreatic duct, passing from the ventral lobe of the 

 gland to open into the ventral wall of the duodenum, almost exactly 

 opposite the entrance of the bile duct. 



XIX. Dissect away the peritoneum from the blood 

 vessels mentioned in 93, and trace them in both 

 directions, turning the stomach over to the left to 

 see the origins of the arteries. Note 



99. The portal vein (Fig. 16, /), passing towards the 

 middle lobe of the liver, and sending off branches to all 

 three lobes. 



It is constituted distally by a gastric vein (), which receives the 

 blood from the stomach, and by a mesenteric vein (du, spl, pn, i), f 

 which receives the blood from the intestine, spleen, and pancreas. 



100. The cceliac artery (Fig. 20, co>), entering the 

 abdominal cavity on the dorsal side of the oesophagus and 

 dividing into two trunks, one of which, the gastro-hepatic 

 artery, sends off a hepatic artery (//) to the liver and 

 a gastric artery (g) to the stomach, while the second or 

 duodenal artery (d) passes down the duodeno-hepatic 

 omentum, and supplies the greater part of the duodenum 

 and the pylorus. 



