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Comparison of esophageal microanatomy in human and porcine tissue. Human esophagus (A) and porcine esophagus (B). Esophageal submucosal glands (ESMGs) are similar in human and porcine esophagus and are located below stratified squamous epithelium and muscularis mucosa. Normal ESMGs contain mucin-producing acini and intercalated ducts. Scale bar = 200 µm.
