第6章 食管(Esophagus)The esophagus is composed of a nonkeratinized squamous epithelium overlying a lamina propria and thin muscularis mucosa. The submucosa contains lymphatics and mucous glands with cuboidal-lined ducts running up to the luminal surface. Under the submucosa is muscularis propria (skeletal muscle proximally, smooth muscle distally), surrounded by the adventitia, which is continuous with mediastinum....
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