title: [Observations on the ultrastructure of the chromaffin cells of Rana esculenta during embryonal development and metamorphosis].
mesh_terms: D000311:Adrenal Glands / Q000648:ultrastructure*; D000818:Animals; D002838:Chromaffin System / Q000648:ultrastructure*; D008675:Metamorphosis, Biological; D011893:Rana esculenta / Q000196:embryology*
vernacular_title: Osservazioni sull'ultrastructtura delle cellule cromaffini di Rana esculent a durante lo sviluppo embrionale e la metaborfosi