THE UROGENITAL SYSTEM 



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of the phallus the prepuce or foreskin, which encloses the glans, is formed 

 by an ingrowth of epidermis around the glans. By the degeneration of 

 the central cells of this ingrowth the prepuce is separated from the glans 

 except on its anal side, where the glans and the prepuce remain connected 

 by the frenulum of the prepuce. 



In the female, changes occur more slowly. Instead of closing as in 

 the male, the urethral groove remains permanently open as the vestibule, 

 and the urethral folds persist as the labia minora. The labial swellings 

 elongate and become in part the labia majora. The elongation of the 

 phallus characteristic of the male does not occur in the female. The 

 glans however persists as the clitoris. Consequently, in respect to 

 external genitals, the female is the undeveloped male. 



Table of Homologies 



Indifferent stage 



Male 



Female 



Internal Genitalia 



Genital fold. 



Mesonephric tubules. 



Mesonephric duct. 



Mullerian duct. 



Urogenital sinus. 



Testis 



Mesorchium 

 Ligamentum testis 

 Ductuli efferentes 



Paradidymis 



Ductuli aberrantes 



Appendix epididymidis 

 (stalked hydatid) 



Corpus and Cauda epi- 

 didymidis 



Ductus deferens 



Seminal vesicles 



Ejaculatory duct 



Appendi.x testis (sessile 

 hydatid) 



Sinus pocularis or 

 uterus masculinus 



Prostatic and mem- 

 branous urethra 

 Prostate gland 

 Bulbo-urethral glands 



Ovary 



Mesovarium 

 Ligamentum ovarii 

 Epoophoron (hydatid 

 of Morgagni) 

 Paroophoron 



Appendix fimbriae 

 Collecting duct of epo- 

 ophoron (canal of 

 Gartner) 



Appendix ovarii 



Uterine tube 



Uterus 



Vagina 



Urethra 



Vestibule 



Para-urethral glands 



Vestibular glands 



