part of part of organ part tympanic membrane pars flaccida of tympanic membrane FMA:56721 pars flaccida Size varies across mammals, with the sheep pars flaccida larger than the human Shrapnell's membrane pars flaccida membranae tympanicae Wikipedia:Pars_flaccida_of_tympanic_membrane pars flaccida (membrana tympanica) UBERON:0018152 A small, triangular, flaccid portion of the tympanic membrane, or eardrum, lying above the malleolar folds, attached directly to the petrous bone at the notch of Rivinus. flaccid part SCTID:279594005