Tunica mucosa
The oesophageal wall consists of the following coats: the innermost, the mucous coat (tunica mucosa), the middle muscular coat (tunica muscularis) and the outer coat of a connective-tissue character, the adventitious coat (tunica adventitia).the mucous coat contains mucous glands whose secretion facilitate gliding of he bolus during swallowing .when the oesophagus is not dilated, the mucosa gathers to form longitudinal folds, which can straighten out when food passes through the oesophagus. The longitudinal pilaction medical coding training hyderabad is very useful service as it will help in the collections and also for the amount that is pending from the payers and patients
