The male sexual organs consist of the 2 testicles, the penis, the prostate, seminal vesicles and vas deferens. The testicles are positioned outside the body cavity in a loose sack called the scrotum. The penis is a shaft which is designed to carry urine and semen out of the body. The prostate and seminal vesicles produce the fluid which nourishes the semen and the vas deferens carries the mature sperm from the testicles up to the prostate.
The testicles have 2 functions which are production and maturation of mature sperm; and the production of testosterone which is released into the blood supply at the back of the testicles. Male fertility depends on the production of healthy mature sperm by the testicles and their passage through the spermatic cord into the ejaculate.
The thin blue tube in the diagram below represents the vas deferens. The procedure is performed about 1.5cm above the testicle on either side.