Duodenum
Identification Points
1. Mucosal villi, lined by columnar epithelium
with microvilli (brush border) and goblet cells.
2. Submucosal Brunner's glands present.
Jejunum
Identification Points
1. Mucosal villi, lined by columnar epithelium with
microvilli (brush border) and lots of goblet cells.
2. Intestinal glands (crypts of Lieberkühn) present.
3. No submucosal glands or Peyer's patch.
Ileum
Identification Points
1. Mucosal villi, lined by columnar epithelium with
microvilli (brush border) and lots of goblet cells.
2. Peyer's patch in mucosal layer extending to
submucosa.
Large Intestine
Identification Points
1. Lining epithelium is tall columnar with lots of
goblet cells.
2. Lamina propria filled with crypts of Lieberkühn.
3. Taenia coli in the muscularis externa.
Appendix
Identification Points
1. Lining epithelium is tall columnar with
lots of goblet cells.
2. Lamina propria filled with lymphold follicles
and few crypts of Lieberkühn.
3. No villi, no taenia coli.