Fine sturcture and function of planarian goblet cells.
D000818:Animals; D002454:Cell Differentiation; D002462:Cell Membrane; D002465:Cell Movement; D004721:Endoplasmic Reticulum; D004848:Epithelium / Q000502:physiology*; D006056:Golgi Apparatus; D008854:Microscopy, Electron; D009093:Mucus / Q000378:metabolism*; D014419:Turbellaria / Q000166:cytology*