On Ligature of the Vas Deferens in the Cat and Researches on the Efferent Ducts of the Testis in Cat, Rat and Mouse

Abstract

In Rodents the inguinal canal is represented by a wide opening and the testis can be retracted into the abdomen. In the cat and other Carnivora the inguinal canal is open but narrow, and retraction is not possible. The operation of vasectomy was performed on a cat which was killed 104 days after the operation. Anatomical and microscopic examination of the testis of the operated side showed perfectly normal spermatogenesis. In the rat and mouse the epididymis is connected with the testis by a membrane of some width in which the vasa efferentia are contained, and a ligature can be passed round them. In-the cat the epididymis is closely attached to the testis and the vasa cannot be separately ligatured.