168 



TOPOGRAPHICAL ANATOMY OF THE 



corrjespouds to the artery of that name, and ends by joining the hypo- 

 gastric vein. A large anastomotic branch connects it with the obturator 

 vein at the lesser sciatic foramen. 



A. sacralis lateralis dextra. 



A. sacralis lateralis sinistra. 

 A. sacralis media. 



A. hypogastrica dextra. 

 A. hypogastrica sinistra 



A. iliaca externa sinistra. 



A. glutaea caudalis sinistra. 

 I A. glutsea caudalis dextra. 

 I A. caudalis lateralis dextra. 



caudalis lateralis sinistra. 

 A. coccygea. 



; M. sacrococcygeus 

 ventralis medialis. 



,M. retractor penis. 



,M. rectococcygeus. 



Ner\e fruni caudal 

 ■escntcric ganRliun.! 



Internal iliac 1 . 



lymph glands.' / ,' 



Left ureter. ' .' / 



\ . iliaca communis. ,' / 



h. spermatica externa.' /' 



.'\. spermatica interna.' 



A. iliaca externa.' 

 Truncus pudendoepigastricus 



N. obturatorius. 



— ^ — W -\'*> ^ > N. dorsalis jjenis. 

 M. coccygeus. 



N \ \ N. hEemorrhoidalis caudalis, 

 \ \ A. pudenda interna. 

 \ N. glut3eus caudalis. 



N. pudendus. I 



N. cutaneus femoris posterior. 



M. obturator internus. 

 ; N. ischiadicus. 



A. obturatoria. 

 Fig. 74. — Dissection of the vessels and nerves of the male pelvis. 



A. HiEMORRHOlDALis CRANiALis.— It will be remembered that the 

 cranial hjemorrhoidal artery is one of the two vessels into which the 

 caudal mesenteric divides (page 110). The terminal part of the artery 

 must now be sought between the two layers of the mesorectum, where 

 it anastomoses with the middle haeraorrhoidal artery. It is accompanied 

 by a vein bearing the same name. 



N. PUDENDUS. — The pudendal nerve is formed by roots from the 

 ventral branches of the third and fourth sacral nerves. It accompanies 



