title: [Sphincters and valves of the digestive system and their clinical significance].
mesh_terms: D001657:Biliary Dyskinesia / Q000209:etiology; D001659:Biliary Tract / Q000033:anatomy & histology; D004064:Digestive System / Q000033:anatomy & histology*; D004931:Esophageal Achalasia / Q000209:etiology; D004947:Esophagus / Q000033:anatomy & histology; D005764:Gastroesophageal Reflux / Q000209:etiology; D006801:Humans; D007415:Intestinal Obstruction / Q000209:etiology; D007422:Intestines / Q000033:anatomy & histology; D009128:Muscle Spasticity / Q000503:physiopathology; D009130:Muscle, Smooth / Q000033:anatomy & histology* / Q000502:physiology / Q000503:physiopathology; D013270:Stomach / Q000033:anatomy & histology
vernacular_title: Sfinktery i klapany pishchevaritel'noĭ sistemy i ikh klinicheskoe znachenie