About Male Reproductive System

By | April 22, 2015

The human male reproductive system is composed of a pair of testes, genital ducts, several accessory glands and penis, Testis is the primary male reproductive organ. it lies in small sac-like muscular structure outside the abdominal cavity called scrotum.

Male Reproductive System parts

Image Source: Wikimedia


  • In male adults, each testis is a small, pinkish and oval. But composite structure about 5 cm in length, 2.5 cm width and 3 cm in thickness.
  • It produces spermatozoa and secrets the male sex hormone testosterone.
  • Maturation of sperms needs temperature less than the body.
  • Sperms achieve maturity and motility in epididymis.

Seminal Vesicles

  • Seminal Vesicles is situated behind the bladder.
  • About 70% of the semen in seminal fluid produced by seminal vesicles.

Prostate Gland

  • Prostate Gland is situated around the first part of the urethra.
  • Enlargement of prostate results in prostatitis i.e. urination is difficult or impossible.


  • Urethra is a thick walled muscular duct and is a common passage for both urine and semen.
  • Urethra traverse and open at the tip of the penis.


  • Penis is a vascular, spongy and erectile structure.
  • Penis contains three longitudinal columns of spongy erectile tissue which becomes filled with blood during sexual excitement.