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- The male reproductive system includes a pair of testes along with accessory ducts, glands and the external genitalia.
- Each testis has about 250 compartments called testicular lobules.
- Each lobule contains one to three highly coiled seminiferous tubules in which sperms are produced.
- Each seminiferous tubule is lined on its inside by two types of cells called male germ cells (spermatogonia) and Sertoli cells.
- The male germ cells undergo meiotic divisions finally leading to sperm formation, while Sertoli cells provide nutrition to the germ cells.
- The regions outside the seminiferous tubules called interstitial spaces, contain small blood vessels and interstitial cells or Leydig cells.
- Leydig cells synthesise and secrete testicular hormones called androgens.
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