THE ABDOMINAL AORTA. 



457 



Fig. 371. THE ABDOMINAL AORTA AND ITS PRINCIPAL BRANCHES. (Tiedemann.) I 



a, ensiform process ; 5, inferior vena cava, passing through the tendon of the diaphragm ; 

 c, ossophagus, passing through the muscular portion ; d and e, right and left crura ; /, f, right and 

 left kidneys with the suprarenal bodies ; g, g', ureters ; h, urinary bladder ; i, i, right and left vasa 

 deferentia, passing; from the internal abdominal rings to the bladder ; k, rectum, divided near its 

 upper end ; 1, 1, abdominal aorta ; 1', middle sacral artery ; 2, 2', right, 3, 3', left inferior phrenic 

 artery, arising by a short common stem from the front of the aorta immediately below the meeting of 

 the crura of the diaphragm ; 4, coeliac axis ; 5, superior mesenteric artery ; 6, 6, renal arteries ; 

 6', 6', suprarenal arteries, arising partly from the aorta and partly from the inferior phrenic ; 7, placed 

 on the front of the aorta below the origin of the spermatic arteries ; 7, 7', placed on the psoas muscles, 

 point to the right and left spermatic arteries as they descend to the internal abdominal rings ; 

 8, inferior mesenteric artery ; 9, 9, 9, lumbar arteries ; 10, 10, common iliac arteries ; 11, between 

 the external and internal iliac arteries ; 12, left epigastric artery ; 13, circumflex iliac ; 14. branches 

 of the ilio-lumbar. 



