114 



OBSTETRICAL PHYSIOLOGY. 



passing from behind forward. Up to this time the sexes cannot be 

 distinguished. 



The male sex is marked by the rapid development of the genital 



Fig. 61. 



Female Organs of a Fcetal Deek. 



a, Uterus ; h, b, Coinua ; c, c, Oviducts ; d, d, Ovaries ; e, e, Wolffian Bodies. 



tubercle, which becomes the penis, whose extremity is enlarged to con- 

 stitute the " glans." The furrow or groove is closed behind, and forms 

 the urethra ; while the genital folds, meeting each other below the 

 penis, join to complete the scrotum. Owing to these changes, the 



Fig. 62. 



Female Fq^tus of the Cow (natural size). 



1, Heart ; 2, Lungs ; 3, Diaphragm : 4, Kidney : a, Wolffian Body ; b, Ger- 

 minal Gland ; c, Wolffian Duct ; (/, Miillerlan Duct ; d', Uterus and Vagina ; 

 d", Abdominal Opening of the Oviduct ; f, Clitoris ; g, Round Ligament of 

 the Uterus. 



digestive are separated from the urino-genital organs, and the urethral 

 canal is connected with the bladder and the excretory ducts of the 

 testicle. 



