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Anatomy - GI > Class 3 - Station 3: Histology of the Gut Tube > Flashcards

Class 3 - Station 3: Histology of the Gut Tube Flashcards

1
Q

What organ is shown here and how can you tell?

A

Oesophagus

  • Stratified squamous epithelium
  • Large muscularis externa
  • No crypts and few glands
  • Can be ducts
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2
Q

What muscle type forms the muscularis externa of the proximal 1/3rd of the oesophagus?

A

Skeletal

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3
Q

What muscle type forms the muscularis externa of the middle 1/3rd of the oesophagus?

A

Skeletal and smooth

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4
Q

What muscle type forms the muscularis externa of the distal 1/3rd of the oesophagus?

A

Smooth

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5
Q

What organ is shown here and how can you tell?

A

Stomach

  • Evidence of gastric pits
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6
Q

What organ is shown here and how can you tell?

A

Stomach

  • Gastric pits
  • Thick MM
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7
Q

Stomach

A
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8
Q

Stomach Muscle

A
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9
Q

What secretory cells are located in the gastric pits?

A
  • Parietal cells
  • Chief cells
  • Mucus cells at the top
  • G cells
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10
Q

Rugae

A
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11
Q

What part of the small intestine is shown here and how can you tell?

A

Duodenum

  • Brunners glands present in SUBMUCOSA
  • Only the oesophagus and duodenum contain glands in the submucosa so look for glands first then at the epithelium
  • Villi in this portion tend to be shorter with flatter tops than the ileum.
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12
Q

What part of the small intestine is shown here and how can you tell?

A

Jejunum

  • No brunners glands
  • No payer’s patches
  • Evident plicae circulae = MORE COMMON IN JEJUNUM
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13
Q

Jejunum

A
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14
Q

What part of the small intestine is shown here and how can you tell?

A

Ileum

  • Extensive payers patches
  • No brunners glands
  • Less plicae circulae
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15
Q

What type of epithelium is present in the villi?

A

Simple columnar

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16
Q

What type of muscle is found in the muscularis externa of the small intestine?

A

Smooth

17
Q

What are the crypts of lieberkuhn?

A
  • Crypts present in the duodenum
  • Secretory
18
Q

How far down do the crypts of lieberkuhn extend?

A

Muscularis mucosae

19
Q

What cells are present in the crypts of lieberkuhn?

A
  • Goblet cells
  • Enterocytes
  • Stem cells
20
Q

What layer are peyers patches found in?

A

Submucosa

21
Q

What part of the gut tube is shown here and how can you tell?

A

Colon

  • Deep straight crypts lined with goblet cells
22
Q

What part of the gut tube is shown here and how can you tell?

A

Colon

  • Long straight crypts with GOBLET CELLS
23
Q

What part of the gut tube is shown here and how can you tell?

A

Duodenum

  • Submucosal brunners glands
  • Villi
24
Q

What part of the gut tube is shown here and how can you tell?

A

Ileum

  • Peyers patches in Submucosa
  • Villi
25
Q

What part of the gut tube is shown here and how can you tell?

A

Anorectal junction

  • Goblet cell crypts present in the proximal section with columnar epithelium
  • Change to stratified squamous epithelium distally = ANAL CANAL

Anatomy - GI (17 decks)

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