tunica mucosa n mucous membrane and esp. that lining the digestive tract
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mucous membrane: the mucous lining of various tubular structures, facing the lumen, comprising the epithelium, basement membrane, lamina propria mucosae, and lamina muscularis mucosae. Called also mucous coat and mucosa.
Tunica mucosa lining the walls of the small intestine.
Medical dictionary. 2011.