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Second Year Systems > GI Histology > Flashcards

GI Histology Flashcards

1
Q

What are the features of connective tissue?

A

Few Cells

Lots of space

Lots of fibers

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2
Q

What are the 4 basic types of tissue?

A

Epithelial

Connective

Muscle

Nervous

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3
Q

What is the meaning of a simple epithelium?

A

One layer

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4
Q

What does epithelium always sit on?

A

Conective tissue

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5
Q

How do you tell if a gland is submucosal?

A

Will lie below the muscularis mucosae

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6
Q

Where are peyers patches found?

A

In the mucosa - they are often stained a purple colour

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7
Q

What is the epithelium in the oesophagus?

A

•Stratified squamous non-keratinised epithelium

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8
Q

What are theglands in the oesophagus that stain very poorly?

A

Mucus glands

These are located in the submucosa

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9
Q

What is the muscle in the oesophagus?

A

•Muscular layer – upper 1/3 skeletal, middle 1/3 – smooth+ skeletal, lower 1/3 - smooth

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10
Q

What is the epithelium in the stomach?

A

Simple columnar epithelium

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11
Q

What is the innermost layer of the muscularis externa in the stomach?

A

Oblique muscle layer

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12
Q

What colour do parietal cells stain?

A

Pink

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13
Q

What is the structure of the crypts of Lieberkuhn?

A

Lined with epithelium containing many types of cells:

Enterocytes (absorb water and electrolytes)

Goblet cells (secrete mucus)

Enteroendocrine cells (secrete hormones)

Stem cells

Paneth cells (secrete antimicrobial peptides)

Cup cells

Tuft cells

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14
Q

Where are Brunner’s glands located?

A

Submucosa of the duodenum

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15
Q

Where are peyers patches most prevalent?

A

In the Ileum

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16
Q

What is the abundance of villi and crypts in the large intestine?

A

No villi and lots of crypts

17
Q

What is the structure of an acinar gland in the GI?

A

Roundish structure with columnar cells and nuclei at the base

Ducts

18
Q

What is not found in the Islets of langerhans in the pancreas?

A

Acini

19
Q

What are numbers 2 and 3 in the picture the pancreas?

A

2 - Exocrine part

3 - Pancreatic duct for exocrine part

20
Q

What is the tissue seen here

A
21
Q

What is the tissue?

What are the characterising features?

A

Duodenum

Villi with a leaflike shape (wide)

Mucus secreting brunner’s glands int he submucosa

Crypts of lieberkuhn

22
Q

What is the tissue type?

What are the characteristic features?

A

Villi have finger like shape (Longer)

Well developed plicae circulares

Crypts of Lieberkuhn

No glands in the submucosa

23
Q

What is this tissue?

What are the characteristic features?

A

Villi are shorter when compared with the jejunum

Peyers patches extend through the lamina propria and the submucosa

Shorter villi

Second Year Systems (21 decks)

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