THE TESTIS SPERMATIC FLUID. 



659 



The lobules (lifter greatly in size, some containing one, and others many of the tubuli ; the 

 total number of the lobules is estimated at about 450 in each testis, and that of the tubuli at 

 840. The convolutions of the tubuli arc so arranged, that each lobule forms a sort of cone, 

 the apex of which is directed towards the. Rcte Testis. It is difficult to trace the free ex- 

 tremities of the Seminiferous tubes, owing to the frequency of their anastomoses with each 

 other; in this respect, therefore, the structure of the testis accords closely with that of the 



Fig. 260. 



Human Testis, injected with mercury as completely as possible; 1, 1, lobules formed of the semini- 

 ferous tubes ; 2, rete testis ; 3, vasa efferentia ; 4, flexures of the efferent vessels passing into the head, 

 5, 5, of the epididymis ; 6, body of the epididymis ; 7, appendix ; 8, cauda ; 9, vas deferens. 



Fig. 261. 



Plan Of the structure of the Testis and Epididymis; a, a. seminiferous tubes; a*, a* : their anasto- 

 moses; the other references as in the last figure. 



