174 



TOPOGRAPHICAL ANATOMY OF THE 



I 



au early branch of the hypogastric. Its course and distribution have 

 already been examined (page 167) 



(3) A. sacralis lateralis.— The lateral sacral artery is generally 

 the largest branch of the hypogastric. Beginning on a level with 

 the joint between the last lumbar vertebra and the sacrum, the 

 artery follows the line of the ventral sacral foramina to about the 



A. hypogastrica dextra. 

 / A. sacralis media. 



Rami spinales. 



A. sacralis lateralis sinistra. 

 ' A. glutjca cranialis. 



A. sacralis lateralis dextra. 



coccygea. 



Aa. caudales laterales 

 ventrales. 



A. glutfea caudalis. 



Aorta. 

 A. iliaca ' 

 externa sinistra. . /' 

 A. hypogastrica sinistra / 

 A. circumflexa^ 

 ilium profunda. 

 .\. spermatica externa. 



A. iliolumhal 



A. iliaca externa 

 A. 



A. pude 

 A. circumflexa 



urethr 



Truncus pudendoepigastricus. 



A. epigastrica caudalis. 



A. pudenda externa. 



A. profunda femoris. 

 A. obturatoria. 



Fig. 77. — Diagram of the arteries of the male pelvis. 



third sacral vertebra, where it divides unequally into the caudal 

 o-luteal and ventral lateral caudal arteries. 



(a) Spinal branches (rami spinales) — generally two in number — 

 leave the lateral sacral artery and immediately enter the vertebral 

 canal by the ventral sacral foramina. They end partly by ramifica- 

 tion in the dura mater, and partly by union with the ventral artery 

 of the spinal cord, (b) The caudal gluteal artery (a. glutcea caudalis) 

 pierces the dorsal border of the combined sacro-spinous and sacro- 

 tuberous ligament, and thus gains the gluteal region where it is 



