title: Interspecific study of the eustachian tube/middle ear system.
mesh_terms: D000328:Adult; D000818:Animals; D004432:Ear, Middle / Q000033:anatomy & histology*; D005064:Eustachian Tube / Q000033:anatomy & histology*; D000882:Haplorhini; D006801:Humans; D008253:Macaca mulatta; D008954:Models, Biological