138 



DE VEL OPMENT. 



in thickness and forms several layers. Next certain of the cells become enlarged 

 and spherical, and form what are called the primitive ova. Around these, other 

 epithelial cells have a tendency to arrange themselves, so as to enclose the ovum 

 in a follicle. The permanent ova, enclosed in their Graafian follicles, are thus 

 formed. 



The Fallopian tube is developed from that portion of the duct of Miiller which 

 lies above the lumbar ligament of the Wolffian body. This duct is at first com- 

 pletely closed at its upper extremity, and its closed extremity remains permanent, 

 forming a small cystic body attached to the fimbriated end of the Fallopian tube, 



and called the " hydatid of 

 Morgagni." Below this a 

 cleft forms in the duct, and 

 is developed into the fim- 

 briated opening of the Fal- 

 lopian tube. 



Below this the duct of 

 Miiller and the ducts of the 

 Wolffian bodies are united 

 together in a structure called 

 "the genital cord," in which 

 the two Miillerian ducts ap- 

 proach each other, lying side 

 by side, and finally coalesce 

 to form the cavity of the 



FIG. 106. Adult ovary, parovarium, and Fallopian tube. (From 

 Farre, after Kobelt). a, a. Eppophoron formed from the upper part 

 of the Wolffian body. b. Remains of the uppermost tubes, sometimes 

 forming hydatids. c. Middle set of tubes, d. Some lower atrophied 

 tubes, e. Atrophied remains of the Wolffian duct. /. The terminal 

 bulb or hydatid. h. The Fallopian tube, originally the duct of Miiller. 

 i. Hydatid attached to the extremity. I. The ovary. 



vagina and 

 coalescence 



This 



uterus. 



commences in 

 the middle of the genital 

 cord, and corresponds to the 

 body of the uterus. The 

 upper parts of the Miil- 

 lerian ducts in the genital cord constitute the cornua of the uterus, little devel- 

 oped in the human species. The only remains of the Wolffian body in the com- 



FIG. 107. Female genital organs of the embryo, with the remains of the Wolffian bodies. (After J. Miiller.) 

 A From a foetal sheep, a. The kidneys. 6. The ureters, c. The ovaries, d. Remains of Wolffian bodies, e. 

 Fallopian tubes. /. Their abdominal openings. B. More advanced, from a foetal deer : a. Body of the uterus, b. 

 Cornua c Tubes, d. Ovaries, e. Remains of Wolffian bodies, c. Still more advanced, from the human foetus 

 of three months : a. The body of the uterus. 6. The round ligament, c. The Fallopian tubes, d. The ovaries. 

 e. Remains of the Wolffian bodies. 



plete condition of the female organs are two rudimentary or vestigial structures, 

 which can be found, on careful search, in the broad ligament near the ovary; 

 the parovarium or organ of Rosenmilller and the paroophoron (Fig. 106). The 



