→ Each testicular 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.
→ Other immunologically competent cells are also present in interstitial spaces.