title: Fine structure of the thyroid follicle of the Pacific hagfish, Eptatretus stouti.
mesh_terms: D000818:Animals; D003594:Cytoplasmic Granules; D004721:Endoplasmic Reticulum; D005399:Fishes / Q000033:anatomy & histology*; D008854:Microscopy, Electron; D013961:Thyroid Gland / Q000166:cytology*