And inside the testes we have the seminar philosophy's where sperm cells are actually formed. So we have the testes shown in brown. By the testes we have the seminfilosubules where spermatogenesis actually takes place. 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.