Epithelium
Columnar
Striated border
Few goblet cells
Duodenum
Epithelium
Columnar
Striated border goblet cells+
Jejunum
Epithelium
Columnar goblet cells++
Ileum
Villi
Broad
Spatula Shaped
Closely packed
Duodenum
Villi
Tongue-shaped
Different heights
Jejunum
Villi
Few thin finger-shaped
Ileum
Lamina propria
Crypts+
No Peyer’s patches
Duodenum
Lamina propria
Crypts+
Diffuse infiltration of lymphocytes
No Peyer’s patches
Jejunum
Lamina propria
Crypts+
Peyer’s patches extend into submucosa
Ileum
Submucosa
Mucus secreting
Brunner’s glands
Duodenum
Submucosa
Only connective tissues and blood vessels
Jejunum
Submucosa
Peyer’s patches
Ileum