title: The secretory activity of the pancreatic delta cells of the young chick and the chick embryo.
mesh_terms: D000818:Animals; D002642:Chick Embryo / Q000502:physiology*; D002645:Chickens / Q000502:physiology*; D007515:Islets of Langerhans / Q000166:cytology* / Q000378:metabolism*; D008854:Microscopy, Electron