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★Layers of Digestive Tract○Mucosa:Most Deep Layer. Contact with Stomach Contents. Produces Secretions. ■Epithelial Layer: ●Epithelium in the mouth, pharynx, esophagus, and anal canl is composed of nonkeritanized stratified squamous epithelium●The lining of the stomach and intestines are composed of simple columnar epithelium●Enteroendocrine cells found in this layer secrete hormones■Lamina Propria: Composed of areolar connective tissue containing blood and lymph vessels●Supports epithelial layer and binds it to the muscularis layer.●MALT (Mucosa-associated lymphatic tissue): Lymphatic nodules contain immune system cells that protect against disease ■Muscularis Mucosae: Thin layer of smooth muscle●Throws mucus membrane of the stomach and small intestines into folds to improve surface area for digestion and absorption.○Submucosa: Composed of areolar connective tissue■Contains blood and lymphatic vessels that receive absorbed food molecules.