digestive system appendix- rectum and clinical Flashcards

1
Q

what is the surface epithelium of the appendix?

A

simple columnar

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2
Q

is there a lamina propria in the appendix?

A

yes

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3
Q

describe the muscularis mucosae of the appendix?

A

poorly developed

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4
Q

the appendix has what type of crypts?

A

short crypts

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5
Q

does the appendix have villi or paneth cells?

A

no

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6
Q

describe the submucosa of the appendix

A

thick layer with larger blood vessels and numerous lymph nodules

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7
Q

does the appendix contain serosa or adventitia?

A

serosa

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8
Q

what is the ME of appendix like?

A

normal pattern but thin

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9
Q

what are the 2 functions of the appendix

A

humoral immunity

reservoir for good bacteria

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10
Q

what is the surface epithelium of the colon?

A

simple columnar

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11
Q

describe the lamina propria of the colon?

A

typical and has intestinal glands (crypts)

colonocytes

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12
Q

describe the MM of the colon?

A

typical

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13
Q

what does the mucosa of the colon lack?

A

villi

paneth cells

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14
Q

describe the muscularis externa of the colon

A

outer longitudinal muscle is gathered into bands called teniae coli and is continuous

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15
Q

constant tonus of tenaie coli results in sacculations called?

A

haustra

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16
Q

what part of the colon is adventitia?

A

ascending and descending colon

17
Q

what part of the colon is serosa?

A

transverse and sigmoid colon

18
Q

does the appendix have villi?

A

no

19
Q

what layer is found covering the muscularis externa of the transverse colon?

A

serosa

20
Q

what layer is found covering the descending colon?

A

adventitia

21
Q

what do you call the outer longitudinal layer in the colon?

A

tenaie coli

22
Q

what makes up the tenaie coli?

A

haustra

23
Q

what is the surface epithelium of the rectum?

A

simple columnar

24
Q

what are the 3 notable features that make the rectum different from the colon?

A

transverse rectal folds
no tenaie coli in ME
luminal wall covering include adventitia

25
Q

what are the significant luminal wall folds of the rectum

A

transverse rectal folds

26
Q

what condition involves stratified squamous epithelium being replaced by mucus-secreting simple columnar epithelium in lower esophagus?

A

barretts esophagus- metaplasia due to chronic problem