Prostate gland

PROSTATE GLAND

  • Prostate gland has various forms in domestic male farm animals.
  • It is located in the floor of the pelvis on or around the neck of the urinary bladder or cranial portion of the pelvic urethra or caudal to the neck of the bladder.
  • It adds its secretion at the time of ejaculation by means of many ducts opening on the pelvic urethra.
  • The secretions are released in the pelvic urethra near the colliculus seminalis.

Functions

  • The salient physiological functions of prostate gland are
    • to secrete prostatic fluid.
    • to secrete more quantity of serous and less quantity of mucous secretion.
    • to stimulate the spermatozoal motility.
    • to help in the formation of vaginal-plug in opposite sex.
    • to secrete little quantity of certain vital bio-chemicals like fructose and citric acid for additional supply of nutrition/energy to spermatozoa during its nourishment.
    • to provide passage for onward-transit of glandular secretion-from the gland to its outlet (i.e.pelvic urethra).
    • To provide liquid medium for the transport of sperm in female reproductive tract.

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Blood supply

  • The blood supply of prostate is by internal pudendal artery.

Nerve supply

  • The prostate is supplied by pelvic plexus.

Species difference

SPECIES

PARS PROPRIA (cm)

PARS DISSEMINATA (cm)
Bull

3 x 1 x 1

12 x 1.5 x 1.0
Boar

3 x 3 x 1

17 x 1.0 x 1.0

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Bull

  • Body – Wide 2.5 – 4 cm, Length – 1-1.5 cm. Thickness 1-1.5 cm.
  • It can be felt as a small protuberance in the cranial end of pelvic urethra by rectal examination. Pars disseminata surrounds the pelvic urethra.

Prostate gland in bull has two parts (disseminated portion)

        • pars disseminata
        • body of prostrate (Pars propria).

Ram

  • It is diffused over a large portion of the pelvic urethra.

Ram has no body of prostate gland and it has only pars disseminata

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Stallion

  • It is situated over the neck of the bladder and cranial portion of the urethra.

Boar

Prostate gland in stallion has two lateral lobes in the cranial end of pelvic urethra and are connected by a structure called isthumus

Pars disseminata is quite extensive in boars as in case of bull and ram.

  • Body is located dorsal to the urinary bladder.

Dog

Prostate gland in dogs opens by two excretory ducts

  • Prostate gland is larger in size, surrounds the neck of the bladder, located in the cranial border of pubis, the size varies with the age.
  • Enlarged in older dogs.

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Last modified: Monday, 11 June 2012, 10:51 AM