426 GENERATION. 



Figure 50. Diagrammatic Representation of the Genito- 

 Urinary System. A, embryonic condition, in which there is 

 no distinction of sex ; B, female form ; C, male form. The 

 dotted lines in B and represent the situations which the 

 male and female genital organs assume after the descent of 

 the ovaries and testicles. The small letters in B and C cor- 

 respond to the capital letters in A. 1 



Fig. 50, A. A, kidney ; B, ureter ; C, bladder ; D, ura- 

 chus, developed into the median ligament of the bladder ; E, 

 constriction which becomes the urethra ; F', Wolffian body ; 

 Gr, 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, gubernacu- 

 lum testis or round ligament of the uterus ; M, genito-urinary 

 sinus ; !N", O, external genitalia. 



Fig. 50, B (female). a, kidney ; b, ureter ; c, bladder ; d, 

 urachus ; e, urethra ; f , remains of the "Wolffian body (parova- 

 rium) ; g, remnant of the Wolffian duct ; h, Fallopian tube ; i, 

 uterus ; i 7 , vagina ; k, ovary ; 1, round ligament of the uterus ; 

 m, extremity of the urethra ; n, clitoris ; n', corpus caverno- 

 surn of the clitoris ; n", bulb of the vestibule ; o, external 

 genital opening ; p, excretory duct of the gland of Bartho- 

 linus. 



Fig. 50, C (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 ; 11, n 7 , 

 n", urethra and penis ; o, scrotum ; p, gland of Cowper ; q, 

 prostate. 



External Organs of Generation. The external organs of 

 generation begin to be developed at about the fifth week. At 

 the inferior extremity of the body of the embryon, a small, 



1 HENLE, Handbuch der systematischen Anatomic des MenscJien, Braunschweig, 

 1866, Bd. ii., S. 340. 



