title: Ultrastructlral and histochemical observations of the external epithelium of echinoderm tube feet.
mesh_terms: D000135:Acid Phosphatase / Q000032:analysis; D000818:Animals; D002467:Cell Nucleus; D002923:Cilia; D004447:Echinodermata / Q000033:anatomy & histology*; D004721:Endoplasmic Reticulum; D004847:Epithelial Cells; D004848:Epithelium; D006056:Golgi Apparatus; D006651:Histocytochemistry; D002479:Inclusion Bodies; D008854:Microscopy, Electron; D008928:Mitochondria; D013215:Starfish / Q000033:anatomy & histology
chemical_list: D000135:Acid Phosphatase