title: A combined relaxing agent and fixative for triclads (planarians).
mesh_terms: D000818:Animals; D005557:Formaldehyde; D006652:Histological Techniques; D008278:Magnesium Sulfate; D008722:Methods; D009093:Mucus; D009566:Nitrates / Q000008:administration & dosage; D014419:Turbellaria / Q000033:anatomy & histology*
chemical_list: D009566:Nitrates; D005557:Formaldehyde; D008278:Magnesium Sulfate