Flashcards in 8. Digestive tract histology Deck (20):
histological characteristic of esophagus
nonkeratinized stratified swusmous epithelium
histological characteristic of stomach
gastric glands ( lamina propria)
histological characteristic of duodenum
villi and microvilli( increased absorptive surface)
brunner glands ( HCO3- secreting cells of submucosa ) annd crypts of LieberKuhn
histological characteristic of jejunum
Plicae circulares and crypts of Lieberkuhn
Plicae circulares ARE... / FUNCTION
-large vlavular flaps projecting into the lumen
-function : slow the passage of the food along the intestines, and afford an incrased surface for absorption
digestive tract histologyb - colon characteristic
-crypts of Lieberkuhn BUT NOT VILLI
-abundant goblet cells
payer pathces ? location ? area of digestive tract ?
lymphoid aggrefates in lamina propria, submuscoasa ileum
area of plicae circulares
jejunum and ileum
area of crypts of Lieberkuhn
small and large intestine ( in epithelium)
area of crypts of Brunner glands
submucosa of duodenum
• What type of epithelial cells normally line the esophagus?
Nonkeratinized stratified squamous epithelium
• A man with celiac disease has loss of villi and microvilli on small intestinal biopsy. Which part of the small intestine is most affected?
The duodenum (villi and microvilli increase the surface area of the epithelium to maximize absorption)
• What submucosal structure is unique to the duodenum?
• Which epithelial glands are found throughout the small intestine?
Crypts of Lieberkühn
• Goblet cells are most highly concentrated in this area of the small intestine.
• Gastric glands are found in this part of the digestive tract.
• Which immunologic structures are unique to the ileum?
• A patient has a bowel biopsy, which later reveals crypts of Lieberkühn but no villi. Which segment was biopsied?
Colon (crypts of Lieberkühn are also present throughout the small intestine, which also contains villi)
• What two segments of the small intestine have plicae circulares?
Jejunum and ileum