304 



HAND-BOOK OF PHYSIOLOGY. 



the vagina, as well as the cervix and the lower portion of the body of the 

 uterus; while the ununited portion of the duct on each side forms the 

 upper part of the uterus, and the Fallopian tube. In certain cases of 

 arrested or abnormal development, these portions of the Miillerian ducts 

 may not become fused together at their lower extremities, and there is 

 left a cleft or horned condition of the upper part of the uterus resembling 

 a condition which is permanent in certain of the lower animals. 



In the male, the Miillerian ducts have no special function, and are 

 but slightly developed. The hydatid of Morgagni is the remnant of the 

 upper part of the Miillerian duct. The small prostatic pouch, uterus 



\ 



Urinary and generative organs of a human female embryo, measuring 3]4 inches in length. 



FIG. 465. A. General view of these parts: 1, supra-renal capsules; 2, kidneys; 3, ovary; 4, Fal- 

 lopian tube: 5, uterus; 6, intestine; 7, the bladder. 



B. Bladder and Generative organs of the same embryo viewed from the side: a, the urinary 

 bladder (at the upper part is a portion of the urachus); 2, urethra; 3, uterus (with two cornua); 4, 

 vagina; 5, part as yet common to the vagina and urethra; 6, common orifice of the urinary and gen- 

 erative organs: 7, the clitoris. 



C. Internal generative organs of the same embryo: 1, the uterus; 2, the round ligaments; 3, 

 the Fallopian tubes (formed by the Mullerian ducts); 4, the ovaries; 5, the remains of the Wolffian 

 bodies. 



D. External generative organs of the same embryo: 1, the labia majora; 2, the nymphse; 3, 

 clitoris; 4, anus. (Miiller.) 



masculinus, or sinus pocularis, forms the atrophied remnant of the dis- 

 tal end of the genital cord, and is, of course, therefore, the homologue, 

 in the male, of the vagina and uterus in the female. 



The external parts of generation are at first the same in both sexes. 

 The opening of the genito-urinary apparatus is, in both sexes, bounded 

 by two folds of skin, whilst in front of it there is formed a penis-like body 



