all of the following testicular features increased with age : thickness of the testicular tunica adventitia , the amount of lipofuscin in the interstitial cell , hyperplasia of interstitial cells , vacuolation of sertoli cell cytoplasm , degeneration of seminiferous tubules and thickness of the seminiferous tubular basement membrane .
C0036770
sertoli cell
C0036630
seminiferous tubules