Key

AC, absorptive cells BGl, Brunner's glands D, ducts

IGl, intestinal glands IMuc, intestinal mucosa LP, lamina propria ME, muscularis externa

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

i mm

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