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Explain human male reproductive system?
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Explain human male reproductive system?
Most of the male reproductive system is located outside of your abdominal cavity or pelvis. The external parts of the male reproductive system include the penis, the scrotum and the testicles.
Penis
The penis is the male organ for sexual intercourse. It has three parts:
- The root: This is the part of the penis that attaches to the wall of your abdomen.
- The body or shaft: Shaped like a tube or cylinder, the body of the penis is made up of three internal chambers. Inside these chambers there’s a special, sponge-like erectile tissue that contains thousands of large spaces that fill with blood when you’re sexually aroused. As the penis fills with blood, it becomes rigid and erect, which allows for penetration during sex. The skin of the penis is loose and elastic, allowing for changes in penis size during anerection.
- The glans: This is the cone-shaped end of the penis. The glans, which is also called the head of the penis, is covered with a loose layer of skin called foreskin. This skin is sometimes removed in a procedure calledcircumcision.
The opening of the urethra — the tube that transports both semen and urine out of the body — is located at the tip of the glans penis. The penis also contains many sensitive nerve endings.
Semen, which contains sperm, is expelled (ejaculated) through the end of the penis when a man reaches sexual climax (orgasm). When the penis is erect, the flow of urine is blocked from the urethra, allowing only semen to be ejaculated at orgasm.
Scrotum
The scrotum is the loose pouch-like sac of skin that hangs behind the penis. It holds the testicles (also called testes), as well as many nerves and blood vessels. The scrotum protects your testes, as well as providing a sort of climate control system. 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 (tighten) 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 very 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 producing sperm. Within the testes are coiled masses of tubes called seminiferous tubules. These tubules are responsible for producing the sperm cells through a process called spermatogenesis.
Epididymis
The epididymis is a long, coiled tube that rests on the backside of each testicle. It carries and stores sperm cells that are created in the testes. It’s also the job of the epididymis to bring the sperm to maturity — the sperm that emerge from the testes are immature and incapable of
fertilization
. During sexual arousal, contractions force the sperm into the vas deferens.- 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 ducts 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 your body. In males, it has the additional function of expelling (ejaculating) semen when you reach 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 make a sugar-rich fluid (fructose) that provides sperm with a source of energy and helps with the sperms’ ability to move (motility). The fluid of the seminal vesicles makes up most of the volume of your ejaculatory fluid, or ejaculate.
- Prostate gland: The prostate gland is a walnut-sized structure that’s 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.
Community Answer
Explain human male reproductive system?
The male reproductive system of the human consists of scrotum, testes, spermatic ducts,
ejaculatory duct,
sex glands, urethra and penis. These organs work together to produce sperm and the other components of semen. The scrotum is a sac-like structure. It contains the testes. It is located inferior to the penis. It provides an ideal temperature for the testes to carry out spermatogenesis.
The testes are the male gonads present inside the scrotum. These are responsible for the production of sperm and testosterone. The inside of the testes is divided into small compartments known as lobules. Each lobule contains seminiferous tubule lined with epithelial cells. The epithelial cells contain stem cells that develop into sperm cells by the process of spermatogenesis.
The sperm produced in the testes moves into the epididymis. It matures there before passing through the male reproductive organs. The scrotum also contains a pair of spermatic cords that connect the testes to the abdominal cavity. The spermatic cords contain the vas deferens along with nerves, blood vessels and lymphatic vessels.
The vas deferens carries sperm from the epididymis into the abdominal cavity to the ejaculatory duct. The smooth muscles present in the vas deferens allows the movement of sperm towards the ejaculatory duct through peristalsis.
The seminal vesicles are exocrine glands that store and produce the liquid portion of semen. They are located posterior to the urinary bladder and anterior to the rectum. The liquid portion consists of proteins and mucus. It has an alkaline pH to help sperm survive in the acidic environment of the vagina. It also contains sugar in the form of fructose to provide for the survival of the sperm cells. The vas deferens joins with the urethra at ejaculatory duct. During ejaculation, the ejaculatory duct opens and expels sperm and the secretions from the seminal vesicles into the urethra. The urethra passes through the prostate and ends at the external urethral orifice located at the tip of the penis. Urine also passes through the urethra.
The prostate is an exocrine gland. It surrounds the urethra. The prostate produces a large amount of liquid of the semen. This fluid contains enzymes, proteins and other chemicals to support and protect sperm during ejaculation.
The penis is the male external sexual organ located superior to the scrotum. It delivers semen into the vagina during sexual intercourse. It also excretes urine through the urethra.
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Explain human male reproductive system?
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