Abstract
ABSTRACTCirculatory disturbance in the rat testis was produced by injecting 0.03 mmoles/kg cadmium chloride subcutaneously or by ligating the vessels of one testis. Temperatures were recorded with thermocouple needles without anaesthesia. Neither acute nor chronic cadmium damage to the testes, nor even vascular ligation, significantly changed the normal temperature difference between rectum and testis. The reactions to heating and cooling of ligated and normal testes were very similar. It is suggested that the vascular mechanisms in the adult rat testis prevent excessive heat from being carried into the testis by the internal spermatic artery, but that the scrotum as such is capable of maintaning the testicular temperature low enough in the absence of arterial blood flow.
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