Now notice that the testes are enclosed in this saclike structure in a flap of skin known as the Scrotum. And what the Scrotum does is it basically maintains a slightly lower temperature than the body core temperature. For example, if the normal body core temperature is about 37 degrees Celsius then the temperature of the scrotum is around 35 degrees Celsius. It's two Celsius degrees lower than the body core temperature. Now the reason for that is because the enzymes involved in producing the sperm cells within our testes function effectively and efficiently at a slightly lower temperature. So that's exactly why the Scrotum functions to maintain a slightly lower temperature than our body core temperature.