Esophagus
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Cervical part of the esophagus of a chicken (HE): detail 1
The lamina epithelialis of the esophagus is a very tick nonkeratinized stratified squamous epithelium. Numerous mucous glands are present in the lamina propria. Frequently these glands are associated with lymphoid tissue. The lamina muscularis mucosae is a very well developed layer. The tunica submucosa is sparse.
For more detail of the lymphoid tissue in the esophagus: see lymphoid tissue - GALT