232 



ABDOMEN 



are reflected, the testis and cord within the scrotum will 

 still be found to be invested by : 



1. The external spermatic fascia, from the aponeurosis of the external 



oblique. 



2. The cremasteric fascia the muscular element of which is derived partly 



from the internal oblique. 



3. The internal spermatic fascia, from the fascia transversalis. 



Internal spermatic artery Internal spermatic vein 



Ductus deferens 

 Inferior epigastric artery ^ 

 Lig. inguinale reflexum 



Transversalis fascia. 



Falx aponeurotica -^ 

 Aponeurosis of ext. oblique (sup. crus) ''"" 



Suspensory ligament (*' 

 Deep dorsal vein ; . 

 Dorsal artery and nerv 

 Superficial dorsal vein 



Septum 

 Profunda artery 



Tunica albuginea 



Urethra 

 Corpus cavernosum urethras 7 



. Artery of bulb 



piniform plexus 

 rnal spermatic fasciz 

 ~~ Cremaster 

 External spermatic fascia 



Aponeurosis of ext. oblique 

 :ernal oblique 

 ransversalis fascia 



runica vaginalis 



Epididymis 

 Sinus epidiclymis 

 Testis 



FIG. 102. Diagram of a Frontal Section through the Penis and the 

 Left Part of the Scrotum. 



Within the skin and the dartos muscle, and the three 

 coverings derived from the three layers of the wall of the 

 abdomen, there is an additional covering of the testis called 

 the tunica vaginalis (Figs. 102, 105). 



The tunica vaginalis is an invaginated serous sac, derived 

 from the lower end of a tube-like process of the peritoneum 

 which descended into the scrotum in the early stages of 



