Electron microscopical studies on the thyroid of a cyclostome, Lampetra japonica, during its upstream migration.
D000818:Animals; D001485:Basement Membrane / Q000166:cytology; D002196:Capillaries; D002923:Cilia; D003239:Connective Tissue Cells; D003594:Cytoplasmic Granules; D004524:Eels; D004847:Epithelial Cells; D008854:Microscopy, Electron; D013961:Thyroid Gland / Q000166:cytology*