The reproductive system has a unique biologic purpose and colorful psychologic side effects. The reproductive system differs fundamentally from the other body systems because its purpose is to ensure survival of the species rather than the individual. The reproductive apparatus in the male includes the testes, seminal ducts, seminal vesicles, certain glands, the urethra and the penis.

Testes
In the fetus, however, they lie within the lower abdominal cavity until about 2 months before birth, when they descend into the scrotum. The interior of testis is divided by fibrous partitions into a number of wedge shaped lobes, each containing one to three seminiferous tubeles. These tubeles eventually become the ductus epididymis. This structure, located on the back of the testis, in turn gives rise to the ductus deferens. Also called the vas deferens, or seminal duct, the ductus deferens ascends the back border of the testis and enters the abdominal cavity, where it travels several inches before joining the seminal vesicle

Seminal Vesicles
The seminal vesicles are two coiled tubes situated just behind the lower portion of the bladder. Each joins a vas deferens and, in so doing, gives rise to ejaculatory duct, a short tube that passes through the prostate gland to join the prostatic urethra

Glands
The accessory male glands include the prostate and the bulbourethral (Cowper's glands). The prostate is about the size of a walnut and surrounds the neck of the bladder and the urethra. Its median and two lateral lobes are composed partly of glandular matter and partly of muscular fibers, the latter encircling the urerthra.

Urethra
The male urethra is a membranous tube that conveys urine and semen to the surface, it extends from the neck of the bladder to the outside opening and is about 20 cm long. The urethra is divided into three parts on the basis of the structures through which it passes: the prostatic, the membranous, and the cavernous or penile portions.

Penis
The penis, the male organ of sexual intercouse (coitus), consists of three division, the root, the body and the extremity or glans penis.