THE UROGENITAL SYSTEM 



145 



known as the epididymis. They are developed in the sublumbar 

 region, and descend prior to or shortly after birth through the 

 inguinal canal into the scrotum. In the majority of colts 



—'£> 



a 



a 





a 



they cannot be felt until the animal is several weeks old. When 

 either or both testicles fail to pass into the scrotum the animal 

 is said to be a cryptorchid or ridgling. A serous membrane, the 



10 Digitized by Microsoft® 



