Parts and function of male reproductive organ?

Answer 1

Penis- Houses a small tube through which urine and semen flow, though never simultaneously.

Testicles- Hard lumps of tissue inside which sperm cells are made and stored.

Urethra- The tube through which urine and semen flow.

Prostate Gland- Secretes semen in which sperm cells are transported.

The penis is mostly used to empty one's bladder, through urination. The other function of the set of genitalia, is to sexually reproduce. When the erect penis (erect from a strong flow of blood surging through it) enters the vagina, the penis is stimulated through its many nerves. After stimulation, the male's lower abs, penile muscles, anal muscles, and pubic muscles all contract in several repetitions. This is called the orgasm, when semen is pushed through the urethra from the prostate. Ejaculation can not be contained or stopped, such as a sneeze.

Answer 2

The penis is perhaps the most visible part of the male sexual anatomy. It is made up of two parts, the shaft and the head (also called the glans.) The shaft houses the corpora cavernosa (two flexible cylinders comprised of erectile tissue that run the length of the penis and support erections), and the corpus spongiosum (erectile tissue surrounding the urethra). In its reproductive capacity, the urethral opening at the tip of the penis delivers sperm into the vagina. Urine also flows out of the body through the urethral opening.

Answer 3

Penis

The penis is the male organ for sexual intercourse. It has three parts: the root, which attaches to the wall of the abdomen; the body, or shaft; and the glans, which is the cone-shaped end of the penis. The glans, which also is called the head of the penis, is covered with a loose layer of skin called foreskin. (This skin is sometimes removed in a procedure called circumcision.) The opening of the urethra, the tube that transports semen and urine, is at the tip of the glans penis. The penis also contains a number of sensitive nerve endings.

Scrotum

The scrotum is the loose pouch-like sac of skin that hangs behind the penis. It contains the testicles (also called testes), as well as many nerves and blood vessels. The scrotum has a protective function and acts as a climate control system for the testes. For normal sperm development, the testes must be at a temperature slightly cooler than the body temperature. Special muscles in the wall of the scrotum allow it to contract and relax, moving the testicles closer to the body for warmth and protection or farther away from the body to cool the temperature.

Testicles (testes)

The testes are oval organs about the size of large olives that lie in the scrotum, secured at either end by a structure called the spermatic cord. Most men have two testes. The testes are responsible for making testosterone, the primary male sex hormone, and for generating sperm. Within the testes are coiled masses of tubes called seminiferous tubules.

Epididymis

The epididymis is a long, coiled tube that rests on the backside of each testicle. It functions in the transport and storage of the sperm cells that are produced in the testes. It also is the job of the epididymis to bring the sperm to maturity, since the sperm that emerge from the testes are immature and incapable of fertilization.

INTERNAL:

· Vas deferens - The vas deferens is a long, muscular tube that travels from the epididymis into the pelvic cavity, to just behind the bladder. The vas deferens transports mature sperm to the urethra in preparation for ejaculation.

· Ejaculatory ducts - These are formed by the fusion of the vas deferens and the seminal vesicles. The ejaculatory ducts empty into the urethra.

· Urethra - The urethra is the tube that carries urine from the bladder to outside of the body. In males, it has the additional function of expelling (ejaculating) semen when the man reaches orgasm. When the penis is erect during sex, the flow of urine is blocked from the urethra, allowing only semen to be ejaculated at orgasm.

· Seminal vesicles - The seminal vesicles are sac-like pouches that attach to the vas deferens near the base of the bladder. The seminal vesicles produce a sugar-rich fluid (fructose) that provides sperm with a source of energy and helps with the sperms' motility (ability to move). The fluid of the seminal vesicles makes up most of the volume of a man's ejaculatory fluid, or ejaculate.

· Prostate gland - The prostate gland is a walnut-sized structure that is located below the urinary bladder in front of the rectum. The prostate gland contributes additional fluid to the ejaculate. Prostate fluids also help to nourish the sperm. The urethra, which carries the ejaculate to be expelled during orgasm, runs through the center of the prostate gland.

· Bulbourethral glands - The bulbourethral glands, or Cowper's glands, are pea-sized structures located on the sides of the urethra just below the prostate gland. These glands produce a clear, slippery fluid that empties directly into the urethra. This fluid serves to lubricate the urethra and to neutralize any acidity that may be present due to residual drops of urine in the urethra.