Here, we have the penis anatomy to give you an illustration about it. Thanks to http://www.pathologyoutlines.com/topic/penscrotumanat.html, which I get the pictures from. Hopefully it can be useful for you.
Corona: It is a ridge of flesh demarcating where the head of the penis and the shaft join.
Corpora Cavernosa: There are two corpora cavernosas in your penis. They are the two spongy bodies of erectile tissue on either side of the penis. They become engorged with blood from arteries in the penis, when the penis erect.
Cowper's Glands: The Cowper's glands secrete a small amount of pre-ejaculate fluid prior to orgasm for neutralizing the acidity within the urethra itself.
Ejaculatory Ducts: The path through the seminal glands which semen travels during ejaculation.
Epididymis: The sperm produced by the seminiferous tubules mature wait here until ejaculation or nocturnal emission.
Foreskin, Prepuce: It is a roll of skin which covers the head of the penis in uncircumcised men.
Frenulum, Frenum: It connects the shaft to the head. It’s a thin strip of flesh on the underside of the penis.
Glans: As the corona it is highly sensitive. The glans is the head of the penis which is usually covered by the prepuce, in uncircumcised men.
Prostate Gland: It produces a fluid that makes up the semen and also squeezes shut the urethral duct to the bladder, to prevent urine from mixing with the semen and disturbing the pH balance required by sperm.
Scrotum: It’s a sac that hangs behind and below the penis and contains the testes, the male sexual glands. The main function is maintaining the testes at approximately 34 C, so the testes produce sperm effectively.
Seminal Vesicles: This is a part of penis where semen, a fluid that activates and protects the sperm after it has left the penis during ejaculation, is produced.
Smegma: It is a substance, which has the texture of cheese. It is secreted by glands on each side of the frenulum in uncircumcised men.
Testes, Testicles: A man has two testicles. Each produces about 150 million sperm a day. In the testis there are the scrotum produce sperm and testosterone, and also a kilometer of ducts called the seminiferous tubules which generate sperm. Each testicle produces nearly 150 million sperm every 24 hours.
Urethra, Meatus: It is a duct by which urine and semen pass out of the body.
Vas Deferens: These are the ducts, leading from the epididymis to the seminal vesicles, cut during the procedure known as vasectomy.