The architecture of the lower esophageal sphincter of the opossum.
D000818:Animals; D002299:Cardia / Q000033:anatomy & histology / Q000166:cytology; D004943:Esophagogastric Junction / Q000033:anatomy & histology* / Q000166:cytology; D005260:Female; D008297:Male; D009130:Muscle, Smooth / Q000166:cytology; D009893:Opossums