Prostate is an important Gland in males and is found in most mammals.

It is often described as the size of a walnut and it is located just below the Bladder.

The prostate gland helps in the production of semen, a fluid that helps transport and nourish sperm.

It is considered an exocrine gland of the Male Reproduction System .

Women do not have a prostate, however, the Skene’s gland in women is the homologous organ.

 

Function

  • The primary function of the prostate is semen production, a milky or white and alkaline substance.
  • The prostate contributes to approximately 30% of the semen production.
  • Another large portion comes from the seminal vesicles and the spermatozoa.

 

Regulation

  • Control of the prostate is done through a hormones, androgen or male hormones, or often referred to as testosterone

 

Location

  • It surrounds the urethra just below the bladder.
  • It can be felt during a rectal exam.
  • The prostate can be divided in two ways: by Zone or by Lobe

 

Zones

1.)  Peripheral Zone

  • Posterior aspect of the prostate
  • Surrounds the distal Uretha
  • Approximately 70% of Prostate Cancers start from this Zone

2.)  Central Zone

  • Surrounds the ejaculatory ducts
  • Approximately 3% of Prostate Cancers
  • If prostate cancer arises in this area the cancer is often more aggressive and can invade the seminal vesicles.

3.) Transition Zone

4.)  Anterior Fibromuscular Zone

  • Is usually without any glandular components
  • Only has muscle and fibrous tissue

 

Lobes

1.) Anterior lobe or Isthmus – Corresponds mostly with the Transitional Zone

2.) Posterior lobe – Corresponds mostly with the Peripheral Zone

3.) Lateral lobes –  Spans all Zones

4.) Median lobes – Corresponds mostly with the Central Zone

 

Main Diseases or Conditions of the Prostate

1.)   Prostate Cancer

2.)  Prostatitis

3.)  Benign Prostate Hyperplasia

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