BRANCHES OF THE ABDOMINAL AORTA 



567 



(c) The oesophageal branch (Ramus oesophageus) passes through the hiatus 

 oesophageus into the thoracic cavity above the oesophagus and anastomoses with 

 the oesophageal branch of the broncho-oesophageal artery. 



Small 

 Colon 

 (origin) 



Fig 449— Pl^n of Chief Branches of Anterior Mesenteric Artert op Horse. 

 1, stump of anterior mesenteric artery; 2, stumps of arteries of small intestine; «. external e^cal artery; 

 4. internal c.cal artery; 5, ileal artery; 6, ventral colic artery; 7. dorsal cohc artery; 8, middle cohc or fi.st 

 artery of small colon. 



The gastric artery often arises by a common trunk ^ith ^hf, ^P^^^i^; • J.^^^^X hem^^^^^ 

 branches may arise separately, or the anterior from the sp emc and the postmor fiom the hepatic. 

 The oesophageal branch often arises from the splenic or the posterior gastric. 



2 The hepatic artery (A. hepatica) is larger than the gastric. It passes for- 

 ward to the right and ventrally on the dorsal surface of the pancreas, covered by 



