The external male sex organs are the penis and scrotum, which is the bag containing the testicles. The head, or glans, of the uncircumcised penis is covered by the foreskin. In circumsision, all part of the foreskin is removed. A pasage way called the urethra runs through the penis.
Urine which has accumulated in the bladder leaves the body through the urethra, as does the semsn which is ejaculated at orgasm. The testicle is the male sex gland. It produces the male hormones which help govern the sex drive and are responsible for male characteristics, such as beard, muscular body and deep voice. The testicles also produce the sperm, the germ cells or seeds of future life which can fertilize the female egg, bringing about preganancy.
The testicles hand in the scrotum away from the body's warmth, since a temperature cooler than body temperature is best for sperm production. The sperm enter a large duct, called the epididymis, and continue travelling up through the two sperm ducts. The total trip after leaving the testicle may take several weeks, during which time the sperm mature. The fluids which comprise the semen are secreted mostly by the seminal vesicles and prostate gland.
At the moment of climax, the prostate, which is a muscular gland, contracts and helps to expel the semen, which includes the sperm as a very small part of it. The semen is emitted through the ejaculation duct, a small duct located within the prostate which empties in to the urethra. The urethra, which passes through the prostate, conducts the semen out of the body.
PROSTRATE GLAND AND SEMEN Shaped like a chestnut, the prostate gland surrounds the neck of the bladder at the point where this organ emties into the urethra. Like the testicles, the prostate gland secretes hormones. The secretion consists of a milky alkaline fluid called spermin and a chemical substance with a peculiar adour. At ejaculation the prostate gland contracts and forces this fluind into the urethra. In front of the prostate gland alongside the right and left deferent duct openings, the derferent duct of the prostate gland, too, opens into the urethra.
The prostate gland encases the urethra end and the deferent duct openings of the urethra lie in front of the prostate gland for two significant reasons. First, in the male ejaculation the deferent duct, its enlarged area and the seminal vesicle repeatedly contract simultaneously and build pressure in the urethra to ejucalete the spermatoza with the epididymis secretion and the seminal vesicle secretion, and by the ejaculation reflex the prostate gland contracts and ejaculates its secretion nearly at the same site into the urethra.
The ejaculation is mixed and emitted as perfected semen. Stimulated by the prostate secretion, the spermatoza grow highly mosile. Of the approximately 3 cubic centimeter semen the male emits at one ejaculation, four -fifths comprise the prostate secretion.
The ejaculated sperm total approzimately 200 to 300 million. Secondly, in an ejaculation the prostate gland contracts and presses the urethra at the upper sperm duct opening, which swells and closes the urethra at this point. This prevents retrograte ejaculation of the semen in the urethra or emission of the urine. The different duct opening swells at the moment of erection.
In next episode let's know about erection and ejaculation