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GI > Digestive tract wall anatomy > Flashcards

Digestive tract wall anatomy Flashcards

1
Q

What are the layers of the gut wall?

A

MSMS

Mucosa
Submucosa
Muscularis externa
Serosa/adventitia

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2
Q

What does the mucosa of the gut wall exist of?

A

epithelium, lamina propria, muscularis mucosa

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3
Q

where is the Meissner nerve plexus?

A

submucosa

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4
Q

what plexus is in the submucosa of the gut wall?

A

submucosal nerve plexus

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5
Q

what is the role of the submucosa?

A

secretion of fluids

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6
Q

which gut wall layer secretes fluid?

A

submucosa

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7
Q

which plexus does the muscularis externa contain?

A

myenteric nerve plexus (Auerbach)

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8
Q

submucosal nerve plexus: name?

A

Meissner

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9
Q

myenteric nerve plexus: name?

A

Auerbach

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10
Q

what is the role of the muscularis externa layer?

A

motility

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11
Q

which part of the gut wall is responsible for motility?

A

muscularis externa

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12
Q

when do you call the outer layer ‘serosa’?

A

when it’s intraperitoneal

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13
Q

when do you call the outer layer ‘adventitia’?

A

when it’s retroperitoneal

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14
Q

serosa: intra- or retroperitoneal?

A

intra

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15
Q

adventitia: intra- or retroperitoneal?

A

retro

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16
Q

ulcers can extent into which layer?

A

muscularis externa, into the outer muscle layer

17
Q

erosions are in which layer only?

A

mucosa

18
Q

muscularis externa: consists of which layer?

A

inner circular layer
myenteric nerve plexus (auerbach)
outer longitudinal later

19
Q

inner layer of the muscularis externa: circular or longitudinal?

A

circular

20
Q

outer layer of the muscularis externa: circular or longitudinal?

A

longitudinal

21
Q

where does the basal electric rythm (slow waves) originate from?

(‘pacemaker cells’)

A

interstitial cells of Cajal

22
Q

interstitial cells of Cajal: role?

A

‘pacemaker cells in the gut’

produce basal electric rythm (slow waves)

23
Q

where are the interstitial cells of cajal located?

A

circular layer in the muscularis externa

24
Q

highest frequency Cajal cells?

A

duodenum

25
Q

lowest frequency Cajal cells?

A

stomach

26
Q

frequency Cajal cells:
duodenum
stomach
ileum

order from high to low

A

duodenum>ileum>stomach

27
Q

gut wall layers: mnemonic?

A

MSMS

GI (14 decks)

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