Describe male reproductive system of man. Draw a neat labeled diagram of it.

Male reproductive system consists of testes, epididymis, vasa deferentia, urethra, external genitalia and accessory glands.

Testes :

• A pair of testes are present in scrotal sacs which help in maintaining low temperature.
• These are connected to abdomen by inguinal canal. Testis is connected to the abdomen by spermatic cord.
• They contain many seminiferous tubules.
• Seminiferous tubules are lined by germinal epithelium. It has spermatogonia that produce spermatozoa and Sertoli cells that nourish sperms.
• Leydig cells secrete the male hormone testosterone.
• Seminiferous tubules open into vasa efferentia through rete testis.

Epididymis :

• These are long, narrow, coiled tubes.
• They give space for storage and maturation of spermatozoa.
• It opens into vas deferens.
• Vasa deferentia :
• These are long, muscular tubes. They enter into abdomen.
• They unite with seminal vesicular duct to form ejaculatory duct.
• Two ejaculatory ducts open into urethra.

Urethra :

• It is common passage for both sperms and urine.
• It extends from urinary bladder and ends with urethral meatus in penis.

Penis :

• It is external genital organ of male.
• It is used to transfer spermatozoa to the vagina of female.
• It is formed by corpora cavernosa and corpus spongiosum.
• The bulged posterior end of penis is called glans penis covered by prepuce.

Accessory glands / Seminal vesicles :

• They secrete alkaline fluid.
• This fluid contains fructose (energy) and prostaglandins.
• Prostaglandins help in the contraction of uterus.

Prostate glands :

• It is located beneath the urinary bladder.
• It helps for nourishment and activation of spermatozoa.

Bulbourethral / Cowper’s glands :

• These secretions act as lubricating and flushing agents of urethra.