Urogenital system of the male frog. The Miillerian ducts (vestigial oviducts) 

 arc seen lateral to the kidneys. They respond to female sex-stimulating hormones. 

 They converge with the Wolffian (mesonephric) duct at the cloaca. Note that 

 the left testis is usually smaller than the right. The vasa efferentia pass between 

 the folds of the mesorchium into the dorsally placed kidneys where they join the 

 uriniferous tubules at the glomeruli. 



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