THE ABDOMEN 



649 



side, where both terminate in the pubic group of the inguinal 

 ghnds. The position of the foregoing three lymphatic trunks 

 accomits for the red hnes which are often seen along the dorsum 

 and sides of the penis when septic matter is absorbed from a venereal 

 sore on the prepuce or glans. Their mode of termination also 

 explains the occurrence of induration, or of suppuration, in the 

 inguinal glands as the result of such sores, or of gonorrhoea. 



The deep lymphatics return the lymph from the substance of 

 the penis, and accompany the dorsalis penis vein into the pelvis, 

 where they terminate in the internal iliac glands. 



The lymphatics of the clitoris correspond with those of the penis. 



Scrotum. — ^The wall of the scrotum is complex, and its con- 

 stituent parts will be made more evident if they are enumerated 

 in the order in which the testes receive them in their original 

 descent from the abdominal cavity. It may be premised that the 

 descent of each testis is preceded by a process of peritoneum, called 

 the processus vaginalis, the lower part of which remains permanent 

 as the tunica vaginalis scroti. The constituent parts of the scrotal 

 wall, enumerated from within outwards, are as follows : timica 

 vaginalis scroti, subperitoneal areolar tissue, internal spermatic 

 fascia, cremasteric or middle spermatic fascia, intercolvmmar or 

 external spermatic fascia, tunica dartos, and skin. 



Skin 



jTj/i Tunica Vaginalis Scroti 



'^'^•■' Subperitoneal Areolar Tissue 

 Internal Spermatic Fascia 

 Middle Spermatic Fascia 

 External Spermatic Fascia 

 Tunica Dartos 



Fig. 2 J 



-Scheme of the Structures forming the Wall of the 

 Scrotum (Transverse Section). 



The tunica vaginalis scroti is the parietal layer of the tunica vaginalis. 



The sabperitoneal areolar tissue is composed of areolar and adipose 

 tissues and a certain amount of plain muscular tissue, its muscular element 

 being known as the middle cremaster. 



The internal spermatic fascia is derived from the fascia transversalis 

 at the margins of the internal abdominal ring, in which vicinity it is called 

 the infundibuliform lascia. In association with the subperitoneal areolar 

 tissue it forms the fascia propria of Cooper. 



The cremasteric, or middle spermatic, fascia is composed of striated 

 muscular tissue, forming the cremaster muscle (external cremaster), and of 

 ^'^^olsLT and elastic tissues. It is traceable superiorly to the lower border 

 ° -I- h '^*^"^^^ oblique and the centre of Poupart's ligament on its deep aspect. 



Ihe intercolumnar, or external spermatic, fascia is composed of connec- 

 tive tissue, and is derived from the intercolumnar fibres which extend 

 between the columns of the external abdominal ring. The internal, middle, 

 and external spermatic fasciae are closely incorporated with one another. 



