GI Histology II Flashcards

1
Q

Duodenum

A

Has a wide spatulate or leaflike distal shape
Deeps crypts of of Lieberkuhn
Brunner’s glands with excretory ducts in submucosa

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2
Q

Ileum

A

Villi narrow and shorter than in jejenum
Crypts of lieberkuhn present
No glands in submucosa

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3
Q

Crypt of Liberukuhn

A

Simple tubular glands within intestinal mucosa

Open between adjacent villi an extend to muscularis mucosa

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4
Q

What type of cells does crypt of liberukuhn have? (3)

A

Goblet cells
Enterocytes
Paneth Cells

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5
Q

Paneth Cells

A

Basal crypt cells
Prominent eosinophilic granules
Produce lysozyme to control intestinal flora

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6
Q

Jejenum

A

Villi longer and narrow
Crypts of Lieberkuhn present
No glands in submucosa

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7
Q

What does the large intestine do?

A
Absorption of fluid
Secretion of mucus for lubrication
Forms fecal mass
Continues digestion started by small intestine
Plenty of goblet cells here
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8
Q

Glands of Brunner

A

Forms bicarbonate and duodenum

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9
Q

What are the major structural features that increase surface area for absorption in G.I tract

A

length of small and large intestine
Pilcae circulares
Villi
Microvilli

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10
Q

Describe histology of crypt-villus system

A

Core has lamina propria

Crypts extend down between villi below bases of villi

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11
Q

Describe fine structure of microvillus

A

Covered in glycolipid coat

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12
Q

Describe glycocalyx

A

Contains array of brush-border enzymes produced by small intestinal epithelial cells( maltase, sucrase, isomaltase, etc..)

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