Understanding Your Penis.

There is the need to fully understand how the penis is structured, this will help those who are concerned with size of their male organ to know if it safe to enlarge the penis.The penis is made of two main chambers known as the corpora cavernosa and corpus spongiosum.
corpora cavernosa is the chamber that is filled with blood during arousal and the swelling of the tissue around the chambers. It is the corpora cvernosa that is responsible erection and also determines the size of the penis as the penis can only be as large as this chamber can allow it.
Description Of  The  Penis Anatomy
Corona: The 'crown,' a ridge of flesh demarcating where the head of the penis and the shaft join.
Corpa Cavernosa: The corpora cavernosa are the two spongy bodies of erectile tissue on either side of the penis which become engorged with blood from arteries in the penis, thus causing erection.
Corpus Spongiosum: The spongy tissue surrounding the urethra. This tissue expends to protect the urethra when filled with blood, but to a lesser extent than the corpora cavernosa.
Cowper's Glands: The Cowper's glands secrete a small amount of pre-ejaculate fluid prior to orgasm. This fluid neutralizes the acidity within the urethra itself.
Dorsal Side: The top or upper side of the penis.
Ejaculatory Ducts: The path through the seminal glands which semen travels during ejaculation.
Epididymis: The epididymis is a 'holding pen' where sperm produced by the seminiferous tubules mature. The sperm wait here until ejaculation or nocturnal emission.
Foreskin, Prepuce: A roll of skin which covers the head of the penis in uncircumsized men.
Frenulum, Frenum: A thin strip of flesh on the underside of the penis that connects the shaft to the head.
Glans: The glans is visible in the illustration as the head of the penis. The glans in uncircumcised men is usually covered by the prepuce. The glans is highly sensitive, as is the corona, the ridge of flesh that connects the glans to the shaft of the penis.
Head: Also known as the glans, this is the bulbous tip of the penis.
Meatus: The opening at the tip of the penis to allow the passage of both urine and semen.
Perineum: The area between the scrotum and anus.
Prostate Gland: Produces a fluid that makes up the semen. The prostate gland also squeezes shut the urethral duct to the bladder, thus preventing urine from mixing with the semen and disturbing the pH balance required by sperm.
Pubococcygeus Muscle: Also known as the PC or pelvic floor muscle, necessary to control urination and ejaculation.
Raphe: Visible ridge running from the meatus to the perineum across the scrotum, formed during fetus development and gender assignation.
Scrotum: The scrotum is a sac that hangs behind and below the penis, and contains the testes, the male sexual glands. The scrotum's primary function is to maintain the testes at approximately 34 C, the temperature at which the testes most effectively produce sperm.
Semen: Fluid produced during ejaculation, made up of 2-5% sperm. The main bulk of semen is seminal plasma, with large concentrations of Zinc, and amines that protect the sperm from the acidic environment of the vagina.
Seminal Vesicles: The seminal vesicles produce semen, a fluid that activates and protects the sperm after it has left the penis during ejaculation.
Shaft: The main length of the penis made up of the corpora cavernosa, corpus spongisum, urethra, cavernosal artery and dorsal vein and artery.
Smegma: A substance with the texture of cheese made up from oils secreted by glands on each side of the frenulum, combined with skin cells, and moisture. This usually only occurs in uncircumcised men.
Testes, testicles: The male sexual glands, the two testes within the scrotum produce sperm and testosterone. Within each testis is a kilometer of ducts called the seminiferous tubules, the organs which generate sperm. Each testicle produces nearly 150 million sperm every 24 hours.
Urethra: Passageway of the penis, carrying urine from the bladder and semen from the testes to the tip of the penis.
Vas Deferens: The ducts leading from the epididymis to the seminal vesicles. These are the ducts that are cut during the procedure known as vasectomy.
Ventral Side: The bottom, or underside of the penis.