Resumen:
The male urethra binds the urinary with the reproductive tract, this structure has been described as a cylinder divided into a pelvic and a peneal portions. There are descriptions of many pathologies affecting the male urethra of dogs, however, the most commonly reported is the obstruction by uroliths. The aim of this study was to measure the caliber of the urethra at different sites by means of a corrosion cast model with epoxy resin and to analyze where are the narrowings of this structure which can be more affected for this obstructions.