title: A closely packed array of membrane intercalated particles at the free surface of hydra.
mesh_terms: D000818:Animals; D002462:Cell Membrane / Q000648:ultrastructure; D002463:Cell Membrane Permeability; D003593:Cytoplasm / Q000648:ultrastructure; D004847:Epithelial Cells; D004848:Epithelium / Q000648:ultrastructure; D006023:Glycoproteins / Q000378:metabolism; D006652:Histological Techniques; D006829:Hydra / Q000648:ultrastructure*; D008854:Microscopy, Electron
chemical_list: D006023:Glycoproteins