458 LABORATORY MANUAL OF HUMAN ANATOMY 



Examine the excretory duct of the testicle (ductus defer ens}. 

 Note its consistence. Is it resistant to the touch? Determine its 

 length. What is its course and what are its relations to the impor- 

 tant structures with which it is associated? 

 Arteries. 



(1) Internal spermatic artery (A. spermatica internet). 



(2) External spermatic artery (A. spermatica externa) (0. T. cremas- 



teric artery). 



(3) Deferential artery (A. deferentialis) (0. T. artery of the vas 



deferens). 



Determine from what vessel each is derived, the relation that 

 they bear to each other and to the component parts of the f unicu- 

 lus spermaticus. Cross-sections should be used to determine these 

 relations. (See Poirier et Charpy, t. v., Fig. 236.) Do these 

 arteries anastomose with one another? 

 Veins. 



Observe an anterior and a posterior group. (Cf. Poirier et Charpy, 

 t. v., Fig. 238.) 



What is the pampiniform plexus (plexus pampiniformis) ? What is 

 the general course of the spermatic veins (Vv. spermaticae) ? Into 

 what veins do they empty? Is there any difference on the right and 

 left sides? 



Nerves. 



(a) External spermatic nerve (N. spermaticus externus) (0. T. genital 



branch of genito-crural). 



(b) Deferential plexus (plexus deferentialis). Note that the ilio-ingui- 



nal nerve (N. ilio-inguinalis) is found in the canal, but that it 

 is not a constituent part of the spermatic cord. 



Lymphatics. 



Whence do they come and to what lymph-glands do they go? 



Round Ligament of Uterus [in Female] (Lig. teres uteri). (Vide 

 Fig. 236.) 



Coverings. 



The coverings should be compared with those of the f uniculus sper- 

 maticus in the male. Note differences. What is the canal of Nuck? 



Arteries. 



(a) External spermatic artery (A. spermatica externa), a branch of 



the A. epigastrica inferior. [Later the course of the A. ovarica, 

 which corresponds to the arteria spermatica interna, will be 

 studied.] Dissect out the terminal branches of this artery in the 

 mons pubis and the labium majus. 



(b) Artery of round ligament, a small artery occasionally found within 



the cellular tissue of the round ligament, which anastomoses with 

 a branch of the A. uterina. 

 Veins. 



Many veins accompanying the round ligament appear mostly on the 

 surface. They communicate with the uterine veins, the veins of the 

 labia majora and clitoris. 



