822 



DEVELOPMENT OF THE REPRODUCTIVE ORGANS. 



In the male, the Miillerian ducts are destined to undergo little development and 

 are of no physiological importance, while the ducts of the Wolffian Iwdies, and 

 probably also some part of their glandular substance, form the principal part of 

 the excretory apparatus of the testicle. The rmited portion of the Miillerian 

 ducts remauis as the vesicula prostatica, which accordingly not only corresponds 

 with the uterus, as was shown by Weber, but likewise, as pointed out by Leuckai-t. 

 contains as much of the vagina as is represented in the male. In some animals 

 the vesicula prostatica is prolonged into comua and tubes ; but in the human 

 subject the whole of the ununited parts of the Miillerian ducts disappear, except- 

 ing, as suggested by Kobelt. their upper extremities, which seem to be the source 

 of the hydatids of Morgagni. The excretory duct of the Wolffian body, from the 

 base of that body to its orifice, is converted into vas deferens and ejaculatory 

 duct, the vesicula seminalis being formed as a diverticulum from its lower part 

 (Waldeyer). 



With respect to the fomiation of the epididymis, it appears certain that the 

 larger convoluted seminal tube, which foi-ms the body and globus minor of the 

 epididymis, arises by a change or adaptation of that part of the Wolffian duct 

 which runs along the outer side of the organ. The vas aben-ans or vasa aber- 



Fig. 61; 



Fig. 615. — Diagram of 

 THE Male Type of 

 Sexual Organs. 



1, 2, 3, 4, and 5, 

 as in iigure 612 ; t, 

 testicle in the place of 

 its original formation ; e, 

 caput eiiididymis ; v d, 

 vas deferens ; W, scat- 

 tered remains of the Wolf- 

 fian body, constituting the 

 organ of Girakles, or the 

 paradidymis of Waldeyer ; 



V h, vas aberraus ; on, 

 Miillerian duct, the upper 

 part of -which remains as 

 the hydatid of Morgagni, 

 the lower part, repre- 

 sented by a dotted line 

 descending to the pro- 

 static vesicle, consti- 

 tutes the cornu and tube 

 of the iiterus masculinus ; 

 g, the gubernaciilum ; 



V s, the vesicula semi- 

 nalis ; p r, the prostate 

 gland ; C, CowiJer's 

 gland of one side ; c f, 

 corpora cavernosa penis 

 cut sliort ; s p, corpus 

 spongiosum urethraj ; s, 

 scrotum ; t' , together with 

 the dotted lines above, 

 indicates the - direction 

 in Avhich the testicle 

 and epididymis change 

 place in their descent 

 from the abdomen into 

 the scrotum. 



rantia of Haller appear to be the remains also, in a more highly convoluted foi-m, 

 of one or more of the tubes of the Wolffian body still adhering to the excretory 

 duct of the organ, and their communication with the mam tube of the epidi- 



