The Parkes Lecture. Heat and the testis

摘要: The evidence for the lower temperature of testes many mammals is summarized, and reasons suggested descent into a scrotum are discussed. Descriptions given various techniques used studying effects heat on testis, whole body heating, local heating (by inducing cryptorchidism, scrotal insulation or immersion in water bath), tissue cell preparations vitro. discussed, testis (weight, histology, physiology, biochemistry endocrinology), numbers motility spermatozoa rete fluid semen, fertilizing ability subsequent development embryos produced when from heated to fertilize normal ova. possible mechanisms damaging as well importance heat-induced abnormalities male reproduction domestic animals humans.