174 



TOPOGRAPHICAL ANATOMY OF THE 



Its course and distribution have 



an early branch of the hypogastric, 

 already been examined (page 167). 



(8) A. sdcralis 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. 



Kami spinales. 



A. sacralis lateralis sinistra. 

 A. glutaea cranialis. 



A. sacralis lateralis dextra. 



A. coccygea. 



Aa. caudales laterales 

 ventrales. 



A. glutaea caudalis. 



Aorta. 

 A. iliaca 

 externa sinistra. 

 L. hypogastrica sinistra , 



A. circumfle.xa^ / 



ilium profunda. 

 \. spermatica externa. 



A. iliolumbalis 



A. iliaca externa dextra. 



A. umbilicalis. 

 A. pudenda interna. 

 A. circumflexa femoris lateralis 



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 

 gluteal 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, (h) The caudal gluteal artery (a. glutaea caudalis) 

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

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



A. bulbi urethnt. 

 A. perinei. 



