DEVELOPMENT OF THE GENITO-URINARY SYSTEM. 



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bladder. This fact is shown by certain cases of malformation, in which the ureters have 

 not reached the bladder, but terminate in blind extremities. The development of the 



FIG. 808. Diagrammatic representation of the genito-urinary system, (Ilenle.) 

 A, embryonic condition, in which there is no distinction of sex ; B, female form; C, male form. The dotted lines in 



J3 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 correspond to the capital letters in A. 

 Fig. 308 A. 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' ; II, 



duct of Muller, 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. 308, B (female). a, kidney ; b, ureter; c. bladder; d, urachus; e, urethra; f remains of the Wolffian body (paro- 



varium) ; g, remnant of the Wolffian duct; h, Fallopian tube ; i, uterus ; i', vagina ; k. ovary; 1. round ligament 



of the uterus; m, extremity of the urethra; n, clitoris; n' corpus cavernosum of the clitoris; n", bulb of the 



vestibule ; o. external genital opening ; p. excretory duct of the gland of Bartholinus. 

 Fig. 308, 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 Muller ; k, testicle ; 1, gubernaculum testis ; n, 



n', n". urethra and penis; o, scrotum ; p, gland of Cowpcr; q, prostate. 



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