The scrotum is a pouch-like structure located outside the abdominal cavity that houses the testes. This positioning is important for the proper development and function of the testes. The temperature inside the scrotum is slightly lower than the core body temperature.
This lower temperature is crucial for spermatogenesis, the process of sperm production, as it is more favorable for the survival and development of sperm cells.
The testes need to be kept at a cooler temperature than the rest of the body because high temperatures can be detrimental to sperm production and quality. By being outside the abdominal cavity in the scrotum, the testes are able to be exposed to a lower temperature, which helps in maintaining the optimal conditions for spermatogenesis.
Therefore, the correct answer is (D) maintain the low temperature.