934 



THE VASCULAE SYSTEM. 



by the sympathetic trunk, and then, after passing medial to and being protected 

 by the 'fibrous arches from which the psoas major muscle arises, it runs behind tht 

 muscle and the lumbar plexus. The upper two arteries, on each side, also pass 

 posterior to the crura of the diaphragm. Beyond the interval between the trans- 

 verse processes of the vertebrae each artery turns laterally and crosses the 



Hepatic veil 



Inferior phrenic artery 



Suprarenal gland 

 Inferior vena cava 



Renal artery 

 vein 



Right ovarian vein 



Ovarian artery 



Ureter 



Psoas major muscle 



Ascending colon 



Common iliac vein 



Common iliac artery 



Middle sacral artery 



Ileum 



Caecum 



External iliac 

 artery 



External iliac 

 vein 



Middle um- 

 bilical liga- 

 ment (O.T. "~ 

 urachus) 



(Esophagus 



Crus of diaphra 



Inferior phrenic 

 artery 



Suprarenal glan 

 Coeliac artery 

 Suprarenal veil 



uperior 



lesenteric arte 



,umbar arteries 



Ureter 



Left colic artery 



Ovarian artery 

 Inferior mesenteric 

 artery 



Descending colon 



Psoas major muscl 

 Commpn iliac artei 

 Sigmoid artery 



^ Common iliac 

 Superior haemc 

 rhoidal artery 



Iliac colon 

 Pelvic colon j 



External iliac 

 artery 



External iliac 

 Uterine tube 



Uterus 



FIG. 773. THE ABDOMINAL AORTA AND ITS BRANCHES. 



quadratus lumboruni the last usually passing anterior to, and the othe 

 posterior to the muscle ; it then pierces the aponeurosis of origin of the trar 

 versus, and proceeds forwards in the lateral abdominal wall, in the interv 

 between the transversus and internal oblique muscles. The lumbar arteri 

 anastomose with one another, with the lower intercostal and subcostal arteries, a: 

 with branches of the superior and inferior epigastric and of the deep circumfl 

 iliac and ilio-lurnbar arteries. 



Fine twigs also pass from the lumbar arteries to the extra-peritoneal fat ; th( i 

 anastomose with corresponding branches from the inferior phrenic and ilio-luml " 

 arteries, and with small branches from the hepatic, renal, and colic arteries, to foi . 

 the subperitoneal plexus of Turner. 



