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MANUAL OF PHYSIOLOGY. 



organs for the conveyance of the ova out of the body, and the 

 Wolffian duct is represented by a rudimentary structure near the 

 ovary. 



Part, however, of the Wolffian duct in both sexes develops 

 similarly ; this, the metanephros, corresponds to that part of the 



FIG. 279. 



Diagram of the genital organs of an embryo previous to sexual distinc- 

 tion. (Allen Thomson.) W. Wolffian body. 3. Ureter. 4. Bladder. 5. 

 Urachus. gc. Genital cord. cp. Clitoris, or penis, m. Miillerianduct. w. 

 Wolffian duct. i. Intestine, ug. Urogenital sinus, d. Cloaca. Is. Part 

 from which the scrotum or the labia majora are developed, ot. Origin of 

 the ovary or testicle respectively, x. Part of Wolffian body subsequently 

 developed into the coni vasculosi. 



duct nearest to the tail end of the embryo. It forms part of the 

 urinary organs, and develops into the permanent ureter and the 

 kidney. 



From the metanephros a projection arises, which grows quickly, 

 and opens into the cloaca ; this remains as the ureter. From the 



