Figure 1627

Photomicrograph of Brunner's glands in the duodenum. This photomicrograph shows part of the duodenal wall in a H&E preparation. A distinctive feature of the duodenum is the presence of Brunner's glands. The dashed line marks the boundary between the villi and the typical intestinal glands (crypts of Lieberkiihn). The latter extend to the muscularis mucosae. Under the mucosa is the submucosa, which contains Brunner's glands. These are branched tubular glands whose secretory component consists of columnar cells. The duct of the Brunner's gland opens into the lumen of the intestinal gland (arrow). X120

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