if a mussel panel something into something else, then that something is a cooked spiritual in that insulation
mussel is shellfish. sterile_environment is tangible_thing. semiconductor_wafer_layer is tangible_thing. lab_glassware is tangible_thing. exterior_membrane_surface_part is tangible_thing. marine_mussel is mussel. winged_mapleleaf_mussel is mussel. edible_mussel is marine_mussel. mussel is mollusc. mulch is protective_covering.