8. Digestive tract histology Flashcards Preview

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Flashcards in 8. Digestive tract histology Deck (20):
1

histological characteristic of esophagus

nonkeratinized stratified swusmous epithelium

2

histological characteristic of stomach

gastric glands ( lamina propria)

3

histological characteristic of duodenum

villi and microvilli( increased absorptive surface)
brunner glands ( HCO3- secreting cells of submucosa ) annd crypts of LieberKuhn

4

histological characteristic of jejunum

Plicae circulares and crypts of Lieberkuhn

5

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

6

digestive tract histologyb - colon characteristic

-crypts of Lieberkuhn BUT NOT VILLI
-abundant goblet cells

7

payer pathces ? location ? area of digestive tract ?

lymphoid aggrefates in lamina propria, submuscoasa ileum

8

area of plicae circulares

jejunum and ileum

9

area of crypts of Lieberkuhn

small and large intestine ( in epithelium)

10

area of crypts of Brunner glands

submucosa of duodenum

11

• What type of epithelial cells normally line the esophagus?

Nonkeratinized stratified squamous epithelium

12

• 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)

13

• What submucosal structure is unique to the duodenum?

Brunner glands

14

• Which epithelial glands are found throughout the small intestine?

Crypts of Lieberkühn

15

• Goblet cells are most highly concentrated in this area of the small intestine.

Ileum

16

• Gastric glands are found in this part of the digestive tract.

Stomach

17

• Which immunologic structures are unique to the ileum?

Peyer patches

18

• 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)

19

• What two segments of the small intestine have plicae circulares?

Jejunum and ileum

20

• A patient with Crohn disease has destruction of his ileal lamina propria and submucosa. What structures are affected by this?

His Peyer patches

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