The viability of the sperm in the testes is dependent upon the relative lower temperature of the testes in comparision to the body temperature. When the environmental temperature is low the testes move closer to the body by way of the spermatic cord and relaxes when the temperature is too high and moves away from the body. The spermatic cord is covered with skeletal muscle and it suspends the testes in place.
"In the unlikely event that both of your testicles were removed you could get by. Your doctor would drop prosthetic testicles into your scrotum. And he'd prescribe a testosterone patch or biweekly injections. Testosterone can be replaced and there will be no decline in the sexual function. Testosterone, rather than causing an erection, only provides the desire for one. You couldn't make babies, but you'd have no trouble making love." (Caine, 323).
The genital ducts of the male reproductive tract carry the mature sperm from the testes to the exterior of the body. The ductus (vas) deferens is the continuation of the epididymis. It is a straight tube located within the spermatic cord. A vasectomy (male sterilization) is the surgical removal, or interruption of a section of the vas deferens, followed by the sealing or tying of each end. The junction of the ampulla and the seminal vesicle duct forms the ejaculatory duct, which receives secretions from the seminal vesicles and the prostate gland before being ejected into the urethra. The urethra is a small tube extending from the bottom of the urinary bladder to the exterior of the body. Its function is to convey both urine and semen to the exterior of the body, each at different times. .
The fluid-producing glands include the seminal vesicle, the prostate, and the Cowper's glands. These glands can also be referred to as accessory glands. The seminal vesicles secrete a viscous, alkaline fluid rich in fructose, which serves to nourish and protect the sperm.
