AC, absorptive cells BGl, Brunner's glands D, ducts
MM, muscularis mucosae MSC, surface mucous cells PGI, pyloric glands PMuc, pyloric mucosa PS, pyloric sphincter V, villi arrows: Fig. 2, Brunner's gland element that passes from the submucosa to the mucosa; Fig. 3, boundary between gastric and duodenal epithelium asterisks, interruption in muscularis mucosae
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