



Tubules within the testis lead into about a dozen small

ducts that drain into the epididymis, a thin tube which

helps to move spermatozoa toward the penis and increase

the fertilizing capacity of the sperm. The duct of the

epididymis connects with the ducts deferents which accross

the pelvic cavity beside the bladder, over the ureter, and

down to the back of the bladder, where it meets the seminal duct from the other testis.

Prostate : secretes most of the seminal fluid and, together with the seminal vesicles , is involved in the maintenance and

activity of the spermatozoa.

Cowper's gland - Also contribute to the production of seminal

fluid.

Testis - Oval organ containing intersticial, or supporting

cells and the hundreds of coiled tubules within which sperm

are formed.

Sexual intercourse both culminates and terminates in orgasm, a process in which the male expels semen, containing sperm cells and a seminal plasma that contains water, salts, cell nutrientes and metabolites. The male's ability to produce and secrete semen, as well as to function sexually, is dependent on the androgen hormones, which circulate in the male's body. As the ejaculation and then orgasm is essential for fertilization, and since the male responses are usualy more rapidly induced, the male probably achieves orgasms more consistently during intercourse than does the female. At the orgasm the penis contracts rhytmically to expel the sperm and semen, a process called ejaculation.