title: Ultrastructure of possible sites of ultrafiltration in some gastropoda, with particular reference to the auricle of the freshwater prosobranch Viviparus viviparus L.
mesh_terms: D000818:Animals; D006325:Heart Atria; D009206:Myocardium / Q000166:cytology*; D012908:Snails / Q000033:anatomy & histology*; D014462:Ultrafiltration