This is normal esophageal squamous mucosa at the left, with underlying submucosa containing mucus glands and a duct surrounded by lymphoid tissue. The muscularis is at the right.
图左边示正常食管鳞状上皮黏膜，黏膜下层内粘液腺体，以及由淋巴组织包围的腺体导管。图右侧示食管肌层。
The proventriculus histological structure was mucosa, submucosa, muscularis and serosa, from the inside to the outside.
前胃组织学结构由内向外依次为黏膜层、黏膜下层、肌层和浆膜层。
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