The scrotal temperature is about 3-40 C below the inner body temperature. Testis produces hormones including male hormone testosterone (a steroid hormone) and sperm (spermatozoa). The epididymis is just to the side of testis. Vas deferens are tubes (one on each side) carrying sperm from testes to prostate and run along blood vessels of the testis. Find out more about the testes and scrotum and how to keep them healthy here.