168 



TOPOGRAPHICAL ANATOMY OF THE 



correspouds 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. glutsca caudalis sinistra. 

 ■ A. glut^ea caudalis dextra. 



; A. caudalis lateralis dextra. 



I ; ; A. caudalis lateralis sinistra. 



A. coccygea. 



; M. sacrococcygeus 

 I ; ventralis medialis. 



,M. retractor penis. 



M. rectococcygeus. 



Nerve from caudal 

 nifsenteric ganglion. 



Internal iliac I ' /' / 

 lymph glands.' /' ,' 



Left ureter. ,' ,.-' 



V. iliaca communis. /' 



A. spermatica externa.' /' 



A. spermatica interna/ 



A. iliaca externa.'' 

 Truncus pudendoepigastricus 



N. obturatorius 



N. dorsalis penis. 

 \ M. coccygeus. 



\ \ \ N. hsemorrhoidalis caudal 

 ' \ \ A. pudenda interna, 

 y \ N. glutaeus caudalis. 



\ N. pudendus. 



N. cutaneus femoris posterior. 



M. obturator internus. 

 N. ischiadicus. 



A. obturatoria. 

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



A. H^MORRHOlDALis CRANiALis. — It will be remembered that the 

 cranial hjpmorrhoidal 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 hfemonhoidal 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 



