part of part of located in located in produces produces mucus esophagus submucosa of esophagus exocrine system gland of digestive tract submucosal esophageal gland http://upload.wikimedia.org/wikipedia/commons/e/e8/Illu_esophageal_layers.jpg esophageal gland NCIT:C32536 Wikipedia:Esophageal_glands FMA:9404 BTO:0003634 mucous gland of submucosa of esophagus SCTID:322749003 UMLS:C0227178 submocosal esophageal gland glandulae oesophageae UBERON:0008989 One of the racemose glands in the walls of the esophagus that in humans are small and serve principally to lubricate the food but in some birds secrete a milky fluid on which the young are fed. submucosal gland