title: A comparative study of the concrement vacuole of certain endocommensal ciliates--a so-called mechanoreceptor.
mesh_terms: D000818:Animals; D002432:Cecum; D003585:Cell Biology; D016798:Ciliophora / Q000166:cytology*; D003593:Cytoplasm; D006736:Horses; D066298:In Vitro Techniques; D008854:Microscopy, Electron; D011984:Sensory Receptor Cells; D013559:Symbiosis