Question

Why are the testis extra abdominal in location ?

Answer 1

Testis has a temperature 2℃ to 2.5℃ lower than the body due to the thermoregulator i.e., scrotum. It protects the sperm from the high body temperature. When temperature decreases, scrotum shrinks, become thick, firm and corrugated, and helps to testes to reach near to the body to get warmth. Similarly, when the temperature rises, scrotum relaxed, becomes thin, flaccid to lose heat. Failure of the testes to descend into the scrotum causes sterility because sperm formation does not occur at the abdominal temperature.