HCC Ybor Campus HCC SouthShore Campus HCC Plant City Campus HCC District Administrative Offices HCC Dale Mabry Campus HCC Brandon Campus

 

The duodenum is the first section of the small intestine. The internal surface of the duodenum is arranged in a series of folds known as the plicae_circulares (sing: plica). These folds originate in the duodenum and continue, but decrease in number and size, through the first section of the ileum. These folds are covered with finger-like extensions called villi (sing: villus).

The plicae plus the villi greatly increase the available surface area for the absorption of nutrients. Simple columnar epithelium covers the surface of these projections, and the villi are filled with supporting CT called lamina_propria.

Deep, narrow channels between the villi are referred to as intestinal_crypts, which are lined with glandular epithelium. These crypts are also termed the crypts_of_Lieberkuhn.

The villi (and their epithelium) represent the bulk of the mucosal layer. At the bottom edge of the mucosal layer is the muscularis_mucosae. Below the muscularis mucosae is the submucosal layer, which contains duodenal (Brunners) glands. These glands produce mucus.

submucosal layer filled with duodenal (Brunner`s) glands intestinal crypt (crypt of Lieberkuhn) intestinal crypt (crypt of Lieberkuhn) intestinal crypt (crypt of Lieberkuhn) intestinal crypt (crypt of Lieberkuhn) intestinal crypt (crypt of Lieberkuhn) intestinal crypt (crypt of Lieberkuhn) intestinal crypt (crypt of Lieberkuhn) intestinal crypt (crypt of Lieberkuhn) intestinal crypt (crypt of Lieberkuhn) intestinal crypt (crypt of Lieberkuhn) intestinal crypt (crypt of Lieberkuhn) intestinal crypt (crypt of Lieberkuhn) intestinal crypt (crypt of Lieberkuhn) intestinal crypt (crypt of Lieberkuhn) intestinal crypt (crypt of Lieberkuhn) villi with columnar cells many of which are goblets (villi are filled with lamina propria)