title: Ultrastructural observations on the parathyroid glands of the hen (Gallus domesticus).
mesh_terms: D000818:Animals; D002645:Chickens / Q000033:anatomy & histology*; D003593:Cytoplasm; D004721:Endoplasmic Reticulum; D005260:Female; D006056:Golgi Apparatus; D008854:Microscopy, Electron; D010280:Parathyroid Glands / Q000166:cytology*; D012270:Ribosomes