Question

How does the animal regulate the temperature of its scrotum during hot and cold climatic conditions?

Answer 1

Blood vessels in the scrotum and around the testes constrict or expand based on the outside temperature. The spermatic cord also is useful in contracting when temperatures are too cold for the testes to stand and thus need to be pulled more into the body cavity to be warm, or relaxing when it's warm enough that the testes need to be away from the body cavity to stay cool