DEVELOPMENT OF THE REPRODUCTIVE ORGANS. 



2045 



The developmental relations of the various parts of the urogenital system to the 

 embryonal structures, as well as their morphological relations to one another in the 

 two sexes, are shown in the diagrams (Fig. 17 19) and accompanying table : 



Male. 



Fig. 1728. 



Female. 



Glans 



Urethral groove. 

 Scrotal fold 

 Anal groove 



Coccygeal - 

 eminence 



Seven and a half weeks. {Herzog.) 



Glans 

 Urethral groove closing 



Raphe. 

 Scrotum 



Glans ciitoiidis 



Labium niajus 

 N) inplia 

 Urogenital sinus 



MUS 



ygeal eminence 



51* — Glans clitoridis 

 " X\-mphae 

 — -Labium majus 



^ Vaginal orifice 



Eleven weeks. {Herzog.) 



Eleven weeks. {Kollmanii.) 



Epithelial 



Urethral groo 

 closed 



Raphe 

 Scrotum 



Glans clitoridis 



Prepuce 

 Urethra 

 Nympha 

 Vaginal orifice 



Anus 



Fifteen weeks. [Herzog-.) 



Sixteen weeks. (Kollmann.) 



Development of e.\ternal generative organs. 



Male 



Testis 



Coni vasculosi and ductulieffer- 



entes 

 Paradidymis 

 Duct of epididymis 

 Vas aberrans 

 Seminal vesicle 

 Appendix of epididymis 

 Appendix of testis 



Prostatic utricle 



Ureter 



Pelvis and collecting tubules 



of kidney 

 Bladder 



Prostatic urethra 



Prostate gland 



Cowper's gland 



Penis 



Lips of urethral groove 



Scrotum 



Indifferent Type 

 Sexual gland 



Wolffian tubules 

 {^sexual group') 



Wolffian duct 



Female 

 Ovary 

 Short tubules of epoophoron 



Paroophoron 



Main tube of epoophoron 



Gartner's duct, when persisting 



Hydatid of Morgagni 

 Oviduct 

 Uterus 

 Vagina 

 Ureter 



Pelvis and collecting tubules ot 

 kidney 



Lower segment of allantois Bladder 

 and part of cloaca 

 Urogenital simis Urethra and \'estibule 



{outgrowths from wall) Paraurethral tubes 



{upper end) 

 Mullerian duct 



Renal outgrowth 

 from Wolffian duct 



Genital tubercle 



Genital folds 



Lahio-scrotal folds 



Bartnolin's gland 

 Clitoris 

 Labia minora 

 Labia majora 



