ABDOMINAL WALL 



411 



The sympathetic filaments extend downwards upon the 

 internal spermatic artery. They come from the renal and 

 aortic plexuses. 



The spermatic lymph vessels enter the abdomen through the 

 abdominal inguinal ring, and join the lumbar glands. 



Testis (O.T. Testicle). The testis should next be examined. 

 First note its position in the scrotum. It lies somewhat 



Skin 



Dartos 



Ext. spermatic fascia -- 



Cremasteric fascia 



Infundibuliform 

 fascia 



Parietal tunica 



vaginalis 

 Visceral tunica"" 

 vaginalis 



Tunica albuginea- - 



A lobule of the 

 testis 



A septule- 



Mediastinum testis 



Digital fossa v 



Internal spermatic vein 



Epididymis - 



Ductus deferens . 



Artery to ductus deferens 



Internal spermatic artery. 

 Internal muscular 

 tunic of Kolliker 



FIG. 154. Transverse section through the left side of the Scrotum and the 

 Left Testis, seen from above. The sac of the tunica vaginalis repre- 

 sented in a distended condition. 



obliquely, with its superior extremity directed forwards and 

 laterally, and its inferior extremity backwards and medially. 

 The left testis usually hangs at a lower level than the right. 



Each testis is enveloped by the tunica vaginalis testis. 



The tunica vaginalis is a serous sac, and, consequently, pre- 

 sents a parietal or scrotal portion, and a visceral or testicular 

 portion. Its extent can be demonstrated in a striking 

 manner by making a small aperture in the parietal part, and 

 then introducing a blow-pipe into the serous cavity and inflat- 

 ing it with air. It will be seen to be considerably larger than 



