ABDOMINAL AOETA 



147 



The Paired Parietal Branches. The Inferior Phrenic arteries 



are the first branches which curve off the aorta as it enters 



the abdomen. They supply the under surface of the diaphragm. 



The Lumbar arteries, of which there are usually four pairs, 



arise in series with the intercostal arteries. They pass back- 



Diaphragm 



Superior Capsular 



Arteries 

 Suprarenal Body 



Mid. Capsular Artery 



Inf. Capsular Artery 



Renal Artery. 



Inferior Vena Cava 

 Right Spermatic Artery. 



Right Ureter 

 Aorta 



Right Common Iliac. 

 Artery 



External Iliac Artery 



External Iliac Vein 



Inf. Phrenic Arteries 

 Coeliac Axis 



Superior Mesenteric 

 Artery 



. .Lumbar Artery 



. _Quadratus Lumborum 

 . Psoas Magnus 



..Inferior Mesenteric 

 Artery 



..Iliacus 

 .Left Spermatic Artery 



'Left Common Iliac Vein 

 "'-.Middle Sacral Artery 



Bladder 



Rectum 



FIG. 57. THE ABDOMINAL AORTA. 



wards over the bodies of the lumbar vertebrae and between the 

 adjacent transverse processes. They pass behind psoas and 

 cross quadratus lumborum to get between the muscles of the 

 anterior abdominal wall. 



The Common Iliac arteries are formed by the bifurcation of 

 the aorta at the lower border of the fourth lumbar vertebra. 



