8M Tin: LI \/ .'/. i/'/i /: 



border, to the l<'#tii-ulnr or spermatic cord :' a thick funiculus contained in tin- 

 middle portion of tho vaginal sheath, and formed by tho aggregation of tho 

 spermatic vessels with tho vas deferens. 



This cord is itself sustained in tho sheath by the friunum that unites the 

 two serous tunics of that cavity. 



STRUCTURE. Independently of the serous tunic that covers tin exterior 

 of tho testicle, there enter into its structure & fibrous membnmr, tiwie proper, 

 and vessels and nerves. Tho excretory duct will be studied separately. 



Fibrous Membrane. This membrane, designated tho timim iiUnnjiiini, 

 forms a strong resisting shell around the testicle, and its texture is 

 channeled by sinuous spaces which lodge the largo spermatic vessels. It 

 is covered by the visceral layer of tho tunica vaginalis, to which it closely 

 adheres ; its inner face sends thin septa into the proper substance of the 

 gland, which divide tho latter into the spermatic lobules. Towards tho 

 upper border of the testicle, and in front, the tunica albuginea is slightly 

 thickened; this port is named the corpus Higmori (or mediastinum textis), 

 and at this point the seminal ducts pass through it to reach the epididymis. 

 (This membrane is dense and inelastic, being composed of white fibrous 

 tissue interlacing in every direction.) 



Tissue proper. The proper substance of the testicle resembles a 



greyish-yellow pulp, contained 

 in the tunic albuginea ; it is 

 divided by tho prolongations 

 which that tunic sends into its 

 interior into small distinct 

 lobules (lobuli tcstis), independ- 

 ent of each other. These 

 lobules vary in number, from 

 two to three hundred, and all 

 have the same organisation, 

 each being constituted by two 

 or three extremely convoluted 

 filiform tubuli, about from one 

 to two yards in length. These 

 tubes, the tubuli seminiferi, 

 anastomose frequently with 

 each other near their extremi- 

 ties, twine together, and can be 

 unwound like a ball of thread. 

 One of their extremities ter- 

 minates in a cul-de-sac, the 

 other being detached from the 

 lobule, and enters a central 

 system of excretory ducts which 

 will be referred to imme- 

 diately. 



When wo cut through a tes- 

 ticle vertically and lengthways, 

 so as to divide the corpus Higli- 

 mori into two lateral portions, there is seen in its substance a whitish 



1 In surgical anatomy, there is sometimes included in the spermatic cord the middle 

 portion of the tunica vaginalis and all its envelopes the serous, fibrous, and erythroid 

 tunics. 





A TESTICLE (HUMAN) 1NJKCTKD WITH MERCURY. 



, a, Lobules formed of seminiferous tubes; 6, Rete 

 tr>tis ; c, Vasa efferentia ; d, Flexures of the efferent 

 vessels passing into the head, e, e, of the epididy- 

 mis ; /, Body of the epididymis ; g, Appendix ; A, 

 Cauda ; ', Vas deferens. 



