title: The fine structure of the protonephridia in the rotifer Asplanchna.
mesh_terms: D000818:Animals; D016782:Apicomplexa / Q000166:cytology*; D002923:Cilia; D002999:Clone Cells; D005260:Female; D008566:Membranes; D008854:Microscopy, Electron; D008858:Microscopy, Phase-Contrast; D010312:Parthenogenesis; D014882:Water-Electrolyte Balance