The eustachian tube: basic considerations.
D004427:Ear Diseases / Q000473:pathology / Q000601:surgery; D005064:Eustachian Tube / Q000033:anatomy & histology / Q000098:blood supply / Q000166:cytology / Q000196:embryology / Q000473:pathology / Q000502:physiology / Q000601:surgery; D006801:Humans