serum and testis selenium ( se ) concentrations , body and testes weights , seminiferous tubule height and width measurements and percent of tubules containing luminal spermatozoa were determined in se-treated ( sse ) and control ( nse ) crossbred ram lambs at 60 , 90 , 120 , 150 and 180 days of age .
C0036630
seminiferous tubule
C0037868
spermatozoa