Skip to main content

male reproductive system

 In cooperation with the women, men were also given the task of supplying generations upon generations of brethren for mankind’s race. They are also equipped with miracle-inducing parts that enable them to propagate with the woman and bring forth life into the world.

Internal Structures

Lateral view of the internal male reproductive organs.

Epididymis

  • This is a tightly coiled tube that is responsible for conducting the sperm from the tubule to the vas deferens.
  • It has a length of approximately 20 feet long.
  • Some sperm are stored in the epididymis, along with the semen.
  • The sperm takes an estimated 12 to 20 days of travel along the epididymis, and a total of 64 days to reach maturity.

Vas Deferens

  • The function of the vas deferens is to carry the sperm through the inguinal canal from the epididymis into the abdominal cavity where it will end at the seminal vesicles and the ejaculatory duct.
  • It is a hollow tube that is protected by a thick fibrous coating and surrounded by arteries and veins.

Seminal Vesicles

  • These are two convoluted pouches along the lower portion of the posterior surface of thebladder.
  • The seminal vesicles secrete a liquid that is viscous and alkaline and has high protein, sugar, and prostaglandin content, which makes the sperm increasingly motile.

Ejaculatory Ducts

  • These ducts pass through the prostate gland to join the seminal vesicles and the urethra.

Prostate Gland

  • This is a chestnut-sized gland that is situated below the bladder.
  • It secretes a thin, alkaline fluid that adds protection to the sperm from being immobilized by the low pH level of the urethra.
  • The urethra passes through its center like a doughnut.

Bulbourethral Glands

  • Also called as Cowper’s gland, these glands also secrete alkaline fluid to counteract the acidic environment in the urethra.
  • These are twp glands located at either side of the prostate gland and seminal vesicles and empty through the short ducts towards the urethra.
  • Semen is a product of 60% from the prostate gland, 30% from the seminal vesicles, 5% from the epididymis, and 5% from the bulbourethral glands.

Urethra

  • This structure passes through the prostate gland towards the shaft and glans penis.
  • It is a hollow tube from the base of the bladder and lined with mucous membrane.
  • It has a length of approximately 8 inches or 18 to 20 cm.

External Structures

Scrotum

  • The scrotum is responsible for the support of the testes and it regulates the temperature of the sperm.
  • It is a rugated, muscular, skin-covered pouch over the perineum.
  • To promote the production and viability of the sperm, the scrotum contracts towards the body during a very cold weather and relaxes away from the body during a hot weather.

Testes

  • In each scrotum lies two oval-shaped glands called the testes.
  • These are 2 to 3 cm in width and are encapsulated in a protective, white fibrous capsule.
  • Several lobules are contained in each testis, which also contains Leydig’s cells that produce testosterone and seminiferous tubules that produce spermatozoa.
  • In most men, one testis is slightly lower than the other to prevent trauma and easily sit or do any muscular activity.

Penis

  • The penis has three parts: two are called the corpus cavernosa, and the other is the corpus spongiosum.
  • These erectile tissues also contain the urethra, making the penis an outlet for both urinary and reproductive functions.
  • Erection of the penis is stimulated by the parasympathetic nerve innervations, and theblood supply for the penis is from the penile artery.
  • The glans, a sensitive, bulging ridge of tissue, is located at the distal part of the penis.
  • The prepuce, which is a retractable casing of skin, protects the glans at birth. It is also the part that is surgically removed during circumcision.
Labels:

Comments

Post a Comment

Popular posts from this blog

mania ( psychiatric disorder)

  Introduction of mania  Mania  is a psychological condition that causes a person to experience unreasonable  euphoria .  Mania  is a dangerous condition in which patient may not sleep &eat while in a manic episode. It is moody disorder. Defination of mania  Mania  is a mood affective disorder , hyperactivity are present into the patient characterised by increase psychomotor activity , irritation or expensive behaviour. Causes of mania -: Stressful life events. -: Using recreational drugs or alcohol. -: Seasonal changes. -: Changes in sleep patterns & lack of sleep. Sign and symptoms of mania -: Increase psychomotor activity. -: Aggressiveness. -: Pressure speak. -: Speak are loudly. -: Flight of idea. -: Illogical thinking. -: Loss of hunger. -: Attention are distrub. -: Improper judgement. -: Loss of sleep. -: Decrease the understanding level. -: Irritability. -: Expensive behaviour. -: Increase the energy level. -: Increase goal directe...
Post a Comment
Read more

Down syndrome

  Down syndrome (DS or DNS) Summary / Definiton  Down syndrome (DS or DNS), also known as trisomy 21, is a genetic disorder caused by the presence of all, or part of a third copy of chromosome 21. It is typically associated with physical growth delays, characteristic facial features, and mild to moderate intellectual disability. The average IQ of a young adult with Down syndrome is 50, equivalent to the mental age of an 8- or 9-year-old child, but this can vary widely. Sign & Symptoms Most children with Down syndrome have: Distinctive facial features, such as a flat face, small ears, slanting eyes, and a small mouth. A short neck and short arms and legs. Low muscle tone and loose joints. Muscle tone usually improves by late childhood. Below-average intelligence. Many children with Down syndrome are also born with heart, intestine, ear, or breathing problems. These health conditions often lead to other problems, such as airway (respiratory) infections or hearing loss. But m...
Post a Comment
Read more

ROLE OF A NURSE IN EPIDEMIOLOGY

 ROLE OF A NURSE IN EPIDEMIOLOGY Role of a nurse in epidemiology can be explained in 4 aspects. These are: Preventive role Promotive role Curative role Rehabilitative role Role in Prevention Epidemiology is one of the basic sciences applicable to nursing. The nurses working in a community deal with people in various settings and help them solve their health problems. They make the nursing process. They identify and investigate the problem, formulate and test the hypothesis regarding the causal factors, formulate alternative interventions and implement to prevent and control the problem and evaluate effectiveness of intervention. They have an active role in the prevention and control of communicable diseases which include:             - Identify sources of infection and methods of spread of infection.             - Health education of people in general.             - Having an important role in...
Post a Comment
Read more