DEVELOPMENT OF THE GENITO-URINARY APPAKATUS. 833 



A 



FIG. 312. Diagrammatic representation of the genitourinary apparatus (Henle). 



I, embryonic condition, in which there is no distinction of sex ; II, female form ; III, male form. The 

 dotted lines in II and III represent the situations which the male and female genital organs assume 

 after the descent of the ovaries and testicles. The small letters in II and III correspond to the cap- 

 ital letters in I. 



Fig. 312, 1. A, kidney ; B, ureter ; C, bladder ; D, urachus, developed into the median ligament of the 

 bladder ; E. constriction which becomes the urethra ; F', Wolffian body ; G, Wolffian duct, with its 

 opening below, G' ; H, duct of Miiller, united below, from the two sides, into a single tube, J, which 

 presents a single opening, J', between the openings of the Wolffian ducts ; K, ovary or testicle ; L, 

 gubernaculum testis or round ligament of the uterus ; M, genito-urinary sinus ; N, O, external 

 genitalia. 



Fig. 312, II (female). a, kidney ; b, ureter ; c, bladder ; d, urachus; e, urethra; f, remains of the Wolf- 



duct of the gland of Bartholinus. 



Fig. 312, III (male). a, kidney ; b, ureter ; c, bladder ; d, urachus ; e, m, urethra ; f, epididymis ; g, vas 



deferens ; g', seminal vesicle ; g", ejaculatory duct ; h, i, remains of the duct of Miiller ; k, testicle; 



1, gubernaculum testis ; n, n', n", urethra and penis ; o, scrotum ; p, gland of Cowper ; q, prostate. 



