CHAPTEK LVIII 



THE REPKODUCTIVE ORGANS 



THE reproductive organs consist in the male of the two testes 

 which produce spermatozoa, and the ducts which lead from them, 



FIG. 604. Plan of a vertical 

 section of the testicle, 

 showing the arrangement 

 of the ducts. The true 

 length and diameter of the 

 ducts have been disre- 

 garded, a a, Tubuli semi- 

 niferi coiled up in the 

 separate lobes ; b, tubuli 

 recti ; c, rete testis ; d, vasa 

 efferentia ending in the coni 

 vasculosi ; I, e, g, convo- 

 luted canal of the epidi- 

 dymis ; h, vas deferens ; 

 /, section of the back part 

 of the tunica albuginea; 

 i i, fibrous processes run- 

 ning between the lobes; 

 s, mediastinum. 



FIG. 605. Section of the epididymis of 

 a dog. The tube is cut in several 

 places, both transversely and ob- 

 liquely ; it is seen to be lined by a 

 ciliated epithelium, the nuclei of 

 which are well shown, c, Connec- 

 tive tissue. (Schofleld.) 



and in the female of the two ovaries which produce ova, the 

 Fallopian tubes or oviducts, the uterus, and the vagina. 



MALE ORGANS 



The testis is enclosed in a serous membrane called the tunica 

 vaginalis, originally a part of the peritoneum. It descends into the 



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