468 



THE ARTERIES OF THE ABDOMEN. 



backwards between the transverse processes with the posterior division of the 

 corresponding spinal nerve, divides into smaller vessels which are distributed to the 

 muscles and integument of the back. 



Fig. 376. THE ABDOMINAL AORTA AND ITS PRINCIPAL BRANCHES. (Tiedemann.) | 



For the detailed, description of this figure, see p. 457. 6, renal arteries ; 6', 6', middle suprarenal 

 arteries ; the upper suprarenal arteries are seen proceeding from the inferior phrenic ; 7, placed on the 

 abdominal aorta below the origin of the spermatic arteries ; 7, 7', lower down, the same arteries 

 descending on the psoas muscles and crossing the ureters, that on the left side entering the internal 

 abdominal ring with the vas deferens t ; 8, inferior mesenteric artery ; 9, lumbar arteries ; 9', a 

 lowest lumbar artery, arising from the middle sacral 1' (see varieties of the latter vessel) ; 10, 10', 

 right and left common iliac arteries ; 11, 11, between the external and internal iliac arteries ; 12, left 

 epigastric artery ; 1 3, deep circumflex iliac artery. 



