SPERMATIC CORD— THE REMS 



1031 



2. The spermatic artery. 



3. Tlic spermatic veins, or {(aiupinitorm plexus, surroiindini: the artery. 



4. Lymphatics running with the veins. 



5. Sympathetic nerves accompanying tlie artery. 



6. The processus vaginalis, occa-sionally seen as a thread-like relic of the 

 tube of connuunication l)et\vccn the tunica vaginalis and peritoneum. It is fre- 

 quently patent for a short distance near the internal inguinal ring, and probably 

 accounts in great })art for the insidious development of hernial protrusions in this 

 region. 



Flo. 626.- Skctikx ok tiik Si-kumatic Cokd. (After Henlc.) 



Small artery 

 Artery of vas 



Internal eremaster 



VAS DEFERENS :- 



Mucous membrane 

 Internal muscular coat 



Middle muscular coat 



External muscular coat 



Internal cremaster 

 Deferential vessels 



7. The internal cremaster of Henle. Scattered l>inulles of smooth muscular 

 fibres, said to re}trcsent the inverted lateral bands of the gubernaculum testis. 



8. Fat and connective tissue, continuous above with the subperitoneal planes 

 of fascia. Inguinal or scrotal lipomata or fibromata may take origin from these 

 elements and may simulate true hernias. 



In the scrotum these various structures are invested by coverings identical 

 with those of tlie testicle. 



THE PEXIS 



The penis is composed of three rod-like segments of erectile tissue, firmly 

 united together and invested 1)V a sheath composed of integument, dartos, and 

 fascia (fig. 627). 



Of these three erectile segments, two. the corpora cavernosa, are placed 

 side by side above or dorsally; the third, the corpus spongiosum, is perforated 

 in the whole length by the urethral canal, and lii's on tlir ventral aspect of the 

 former, except where it expands distallv to form the free end of the organ 

 (fig. B28). 



The penis as a whole may be divided into a root, a body, and a terminal 

 enlargement or glans; the root is attached to the symphysis and pubic arch; the 

 body, prismatic, with rounded angles in section, forms the greater part of the free 

 ])ortion of the organ; and the glans is a heart-shaped expansion, more developed 

 on its dorsal than on its ventral aspect, and presenting the urethral orifice at its 

 distal extremity. The body and glans are separated by a constriction called the 

 neck. 



The coverings of the penis are continuous with those of the testicl(\ The 

 skin, like that of the scrotum, is pigmented and highly elastic, and unlike the skin 



