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?

19
Q

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

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?

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
what are the significant luminal wall folds of the rectum
transverse rectal folds
26
what condition involves stratified squamous epithelium being replaced by mucus-secreting simple columnar epithelium in lower esophagus?
barretts esophagus- metaplasia due to chronic problem