998 



DEVELOPMENT OF THE GENERATIVE ORGANS. 



in animals with horned uteri, the cornu of the uterus ; but in the human subject 

 it remains comparatively short, entering into the formation of the upper part of the 

 organ. The remaining upper portion of the Miillerian duct constitutes the Fallopian 

 tube becoming at first open and subsequently fringed at its upper extremity. In the 

 peritoneal elevation between the ovary and the base of the Wolffian body the fibrous 

 ligament of the ovary is developed, while that part which proceeds onwards to the canal 

 of Nuck becomes the round ligament of the uterus. The excretory ducts of the Wolf- 

 fian bodies disappear in the human female, but in the pig and some ruminants they 

 persist as the canals of Gaertner. The parovarium is generally believed to consist of 

 the vestiges of some of the tubules of the Wolffian body, but it is held by Banks to 



Fig. 694. 



Fig. 694. DIAGRAM OP 

 THE MALE TYPE OF 

 SEXUAL ORGANS. 



1, 2, 3, 4, and 5, as 

 in the preceding figure ; 

 t, testicle in the place of 

 its original formation ; e, 

 caput epididymis ; v d, 

 vas deferens ; W, scat- 

 tered remains of the 

 Wolffian body constituting 

 the organ of Giraldes; 

 v h, vas aberrans ; m, 

 Miillerian duct, the upper 

 part of which remains as 

 the hydatid of Morgagni, 

 the lower part repre- 

 sented by a dotted line 

 as descending to the 

 sinus pocularis consti- 

 tutes the cornu and tube 

 of the uterus masculinus ; 

 g, the gubernaculum ; 

 v s, the vesicula semi- 

 nalis ; p r, the prostate 

 gland ; C, Cowper's 

 gland of one side ; cp, 

 corpora cavernosa penis 

 cut short; s p, corpus 

 spongiosum urethra ; s, 

 scrotum ; t', together 

 with the dotted lines 

 above, indicates the di- 

 rection in which the 

 testicle and epididymis 

 change place in their de- 

 scent from the abdomen 

 into the scrotum. 



owe its origin to a development of tubes in the whitish blastema previously men- 

 tioned, which appears in connection with the upper part of that body when it begins 

 to shrink, and which, in the male, gives rise to the upper part of the epididymis ; 

 and in this view Allen Thomson is disposed to concur. 



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

 are of no physiological importance, while the ducts of the Wolffian bodies, and pro- 

 bably also some part of their glandular substance, form the principal part of the excre- 

 tory apparatus of the testicle. The united portion of the Mullerian ducts remains as 

 the vesicula prostatica, which accordingly not only corresponds with the uterus, as 

 was shown by Weber, but likewise, as pointed out by Leuckart, contains as much of 

 the vagina as is represented in the male. In some animals the vesicula prostatica 

 is prolonged into cornua and tubes ; but in the human subject the whole of tho 



