BRANCHES OF THE ABDOMINAL AORTA 



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the gastro-pancreatic fold, crossing obliquely 

 under the vena cava, and reaches the inner 

 border of the portal vein. It divides into three 

 or four branches which enter the portal fissure 

 of the liver and ramify within the gland with the 

 portal vein and the hepatic duct. It gives off the 

 following collateral branches: 



(a) Pancreatic branches (Aa. pancreaticse) 

 are given off as the artery crosses the pancreas, 

 in which it is partly embedded. 



(6) The pyloric artery (A. gastrica dextra) 

 arises above the first curve of the duodenum. It 

 descends to the pylorus, sending branches to the 

 first part of the duodenum and the pylorus, and 

 anastomoses with the gastric and right gastro- 

 epiploic arteries. It may arise from the gastro- 

 duodenal. 



(c) The gastro-duodenal artery (A. gastro- 

 duodenalis) passes to the second curve of the 

 duodenum and divides into the right gastro- 

 epiploic and the pancreatico-duodenal. The 

 right gastro-epiploic artery (A. gastroepiploica 

 dextra) crosses over the posterior surface of the 

 duodenum and enters the great omentum, in 

 which it runs to the left, parallel with the 

 greater curvature of the stomach. It gives 

 branches to the latter and to the omentum and 

 forms an anastomotic arch with the left gastro- 

 epiploic artery. The pancreatico-duodenal artery 

 (A. pancreaticoduodenalis) divides into pancreatic 

 and duodenal l)ranch(;>s. The former (Ranuis pan- 

 creaticus) supplies the middle part of the pancreas 

 and is often replaced by a number of variable 

 twigs. The duodenal jjranch (Ramus duodenalis) 

 passes to the right along the lesser curvature of 

 the duodenum and anastomoses with the first 

 branch of the anterior mesenteric artery. 



3. The splenic artery (A. lienahs) is the 

 largest branch of the ca'Iiac. It passes to the left 

 (with the large satellite vein) on the left extremity 

 of the pancreas and across the saccus csecus of the 

 stomach. Entering the suspensory ligament of 

 the spleen, it runs in the hilus of the spleen to 

 the apex, beyond which it is continued as the 

 left gastro-epiploic. It gives off the following 

 branches : 



(a) Pancreatic branches (Rami pancreatici) 

 to the left extremity of the pancreas. 



(6) Splenic branches (Rami lienales), which 

 plunge into the substance of the spleen. 



(c) Gastric branches (Aa. gastricse breves), 

 which pass in the gastro-splenic omentum to the 

 greater curvature of the stomach, where they bi- 

 furcate and anastomose with the gastric arteries. 



