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. 1719) and accompanying table : 



MALE. 



FIG. 1728. 



FEMALE. 



Glaus 



Urethral groove 

 Scrotal fold 

 Anal groove i 



Coccygeal . 

 eminence 



Seven and a half week; 



Glans 



Urethral groove closing- 

 Scrotum : 



.Glans clitoridis 



Labium majus 

 Nympha 

 Urogenital sinus 



Anus 

 Coccygeal eminence 



Nine weeks. (Keibel.) 



Glaus clitoridis 

 Nymphas 

 Labium majus 



Vaginal orifice 



Eleven weeks. (Kollmann.) 



Epithelial knob 



Urethral groove 

 closed 



Glaus clitoridis 



Prepuce 

 Urethra 

 Nympha 

 Vaginal orifice 



Fifteen weeks. (Herzog.) 



Sixteen weeks, (ffollmann.) 



Development of external 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 

 (se .vital group) 



Wolffian duct 



(upper end) 

 UTitllerian duct 



Renal outgrowth 

 from Wolffian duct 



Lower segment of allantois 



and part of cloaca 



Urogenital sinus 



{outgrowths from wall) 



Genital tubercle 



Genital folds 

 Labio-scrotal folds 



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 of 



kidney 

 Bladder 



Urethra and vestibule 

 Paraurethral tubes 

 Bartholin's gland 

 Clitoris 

 Labia minora 

 Labia majora 



