Male Reproductive System – Class 12 | Chapter – 3 | Biology Short Notes Series PDF

Male Reproductive System: Male reproductive system is located in the pelvis region. It Consists of – a pair of testis, glands, accessory ducts, external genitalia. The male reproductive system is responsible for sexual function, as well as urination.

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The entire male reproductive system is dependent on hormones. These are chemicals that stimulate or regulate the activity of your cells or organs. The primary hormones involved in the functioning of the male reproductive system are follicle-stimulating hormone (FSH), luteinizing hormone (LH) and testosterone.

  • The male reproductive system is positioned in the pelvis region and comprises a pair of testes in addition to the accessory glands, ducts, and the external genitalia.
  • A pouch-like structure known as scrotum encloses the testes located outside the abdominal cavity.
  • Each testis has close to 250 testicular lobules(compartments). These lobules comprise 1-3 seminiferous tubules wherein the sperms are produced. the lining of these tubules consists of two types of cells – male germ cells and sertoli cells.
  • The exterior of these tubules consist of spaces containing blood vessels and Leydig cells.
  • Male sex accessory ducts comprises rete testis, vasa efferntia, epididymis and vas deferens.
  • The urethra opens externally to the urethral meatus.
  • The male external genitalia, the penis is covered by foreskin which is a loose fold of skin.

Male Reproductive System

Parts of Male Reproductive System

  • Penis: Penis are the organ used for urination and sexual intercourse. It has spongy tissue which can fill with blood to cause an erection. It contains the urethra, which carries both urine and semen.
  • Scrotum: Scrotum is a loose bag of skin that hangs outside the body, behind the penis. It holds the testes in place.
  • Testes (or testicles): Testes are a pair of egg-shaped glands that sit in the scrotum, on the outside of the body. They produce sperm and testosterone, which is the male sex hormone.
  • Epididymis: Epididymis is a highly coiled tube that lies at the back of the testes. All sperm from the testes must pass through the epididymis, where they mature and start to ‘swim’.
  • Vas deferens: Epididymis is a thick-walled tube joined to the epididymis. It carries sperm from the epididymis up to the prostate gland and urethra.
  • Prostate gland: Prostate gland is a walnut-sized gland that sits in the middle of the pelvis. The urethra runs through the middle of it. It produces the fluid secretions that support and nourish the sperm.
  • Urethra: Urethra is a tube that extends from the bladder to the external opening at the end of the penis. The urethra carries both urine and sperm.
  • Seminal vesicles: Seminal vesicles are 2 small glands above the prostate gland that make up much of the fluid in semen.

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