production and fates of transosomes ( sacs of ribosomes made in the follicular cells of an ovarian follicle and subsequently passed to the cytoplasms of the oocyte ) have been studied by electron microscopy in ovaries of young chicks , a testosterone-treated hen , aged hens which had ceased laying eggs and a `` '' non-layer '' '' mutant .
C0035553
ribosomes
C0010834
cytoplasms