FARTHER DEVELOPMENT OF THE GEXITAL FASSAGES. 819 



the Miallerian ducts into their passages, and in the abortive disappear- 

 ance of the greater part of the Wolffian ducts ; while in the male the 

 ducts of Miiller suffer in a great measure the abortive retrogradation, 

 and the seminal conducting tubes are produced out of canals formed 

 within special parts of the Wolffian body and the whole of the Wolffian 

 duct. But as in all embryoes of whatever sex both sets of tubes are 

 originally present, while a different one of the original tubes becomes 

 developed into the respective permanent conducting passages, vestiges 

 of the other original tubes are invariably present in various degrees in 

 both sexes. 



The Female passages. — In the female, the vagina, uterus, and 

 Fallopian tubes are formed out of the Miillerian ducts. That portion 

 of the ducts in which they become fused together is developed into the 

 vagina, the cervix, and part of the body of the uterus ; and the pecu- 



Fi-. 612. —DiA- Fig. 612. 



GKAJI OF THE FE- 

 MALE Type op 

 Sexual Organs. 



This and figure 



615 represent dia- 



grammatically a 



state of the parts 



not actually visi- 

 ble at cue time ; 



but they are in- 

 tended to illustrate 



the general type in 



the two sexes, and 



more particularly 



the relation of the 



two conducting 



tubes to the develop - 



inent of one as the 



natural passage in 



either sex, and to 



the natural occur- 

 rence of vestiges of 



the other tube, as 



•well as to the per- 



•sistence of the whole 



or i>arts of both 



tubes in occasional 



instances of herma- 

 phroditic nature. 



1, the left kid- 

 ney ; 2, suprarenal 

 body ; 3, ureter, of 

 which a i)art is re- 

 moved to show the 



parts passing within it ; 4, urinary bladder ; 5, urachus ; o, the left ovary nearly in the 

 place of its original formation ; p o, parovariiun, ejioophoron of Waldeyer ; W, scattered 

 remains of Wolffian tubes near it, parooi^horon of Waldeyer ; d G, remains of the left 

 Wolffian duct, such as give rise to the duct of Gaertner, represented by dotted lines ; 

 that of the right side cut short is marked w ; /, the abdominal opening of the left 

 Fallopian tube ; u, the upper part of the body of the uterus, presenting a slight appear- 

 ance of division into cornua ; the Fallopian tube of the right side cut short is marked 

 in ; g, round ligament, corresponding to gubernaculum ; i, lower part of the intestine ; 

 V a, vagina ; 7i, situation of the hymen ; C, gland of Bartholin (Cowper's gland), and 

 immediately above it the urethra ; c c, corpus cavernosum clitoridis ; s c, vascular bulb or 

 corpus spongiosum ; n, nympha ; I, labium ; v, vulva. 



3 G 2 



