Small and large intestines Flashcards

1
Q

What is the suspensory ligament of Treitz?

A

Fold of peritoneum containing muscle fibers and CT that surrounds the duodeno-jejunal flexure

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2
Q

What is the arterial supply of the proximal duodenum?

A

Superior pancreaticoduodenal branch of gastroduodenal A

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3
Q

What is the arterial supply of the distal duodenum?

A

Inferior pancreaticoduodenal branch of superior mesenteric A

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4
Q

What is the venous drainage of the duodenum?

A

Superior mesenteric V and splenic veins to hepatic portal vein

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5
Q

What is the drainage of the anterior lymphatics of the duodenum?

A

Into pancreaticoduodenal and pyloric nodes

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6
Q

What is the drainage of the posterior lymphatics of the duodenum?

A

Into superior mesenteric nodes

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7
Q

What is the arterial supply of the jejunum and ileum?

A

Jejunal and ileal branches of the superior mesenteric arteries forming arcades that form vasa recta

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8
Q

What is the venous drainage of the jejunum and ileum?

A

To superior mesenteric vein to splenic vein to portal vein

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9
Q

What are clinical signs of Meckel’s diverticulum?

A

Melena
RLQ pain
Vomiting
Intussusception
Volvulus
Obstruction near terminal ileum

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10
Q

What are the early and late signs of intussusception?

A

Early - N/V, and abd cramps
Late - rectal bleeding

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11
Q

What is the location of McBurney’s point on the abdomen?

A

Junction of medial 2/3 and lateral 1/3 of right spino-umbilical line

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12
Q

What is the branching leading to the appendicular artery?

A

Abd aorta to superior mesenteric to ileocolic to appendicular A

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13
Q

What are the clinical signs of appendicitis?

A

Pain in the umbilical or epigastric region that later localizes to right lumbar region
Nausea/vomiting
Anorexia
Fever
Tenderness to palpation
Percussion in right lumbar region

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14
Q

Where would you find numerous Peyer’s patches?

A

Ileum

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15
Q

What are the branches of the superior mesenteric artery?

A

Inferior pancreaticoduodenal
Jejunal and ileal
Ileocolic
Right colic
Middle colic

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16
Q

What are the branches of the inferior mesenteric artery?

A

Left colic
Sigmoid
Superior rectal

17
Q

What forms the marginal artery of Drummond?

A

Branches of SMA and IMA forming collateral ring along wall of colon

18
Q

What is the lymphatic drainage of the small intesting?

A

Celiac and superior mesenteric nodes

19
Q

What is the lymphatic drainage of the large intestine?

A

Epicolic nodes
Paracolic nodes
Intermediate nodes
Terminal nodes

20
Q

What structures are palpable in a digital rectal exam of a male pt?

A

Prostate
Seminal vesicles
Vas deferens

21
Q

What structures are palpable in a digital rectal exam of a female pt?

A

Perineal body
Cervix

22
Q

What is the arterial supply to the rectum?

A

Superior rectal branch of IMA
Middle rectal branch of internal iliac
Inferior rectal branch of internal pudendal

23
Q

What is the venous drainage of the rectum?

A

Superior rectal to IMV to splenic to portal
Middle and inferior rectal to internal iliac to systemic circulation

24
Q

What are characteristics of the upper anal canal?

A

Anal columns
Anal sinuses

25
Q

What structures are present of the pectinate line?

A

Anal valves

26
Q

From what does the lower anal canal develop from?

A

Ectoderm

27
Q

What are the characteristics of an internal hemorrhoid?

A

Above pectinate line
Painless
Profuse bleeding

28
Q

What are the characteristic of an external hemorrhoid?

A

Below pectinate line
Very painful
Minimal bleeding

29
Q

What is the nerve supply that relaxes the internal anal sphincter?

A

Parasympathetic

30
Q

What is the nerve supply that maintains the tone of the internal anal sphincter?

A

Sympathetic

31
Q

What is the innervation of the external anal sphincter?

A

Somatic
Inferior rectal branch of pudendal nerve

32
Q

How is surface area increased in the small intestine?

A

Circular folds
Villi
Microvilli

33
Q

Where would you see crypts of Lieberkuhn?

A

Simple tubular intestinal glands that extend from the muscularis mucosa and open into the lumen at base of villi in SI and in the colon

34
Q

What is a histological marker of the ileum?

A

Peyer’s patches

35
Q

What is the histological marker of the jejunum?

A

Submucosa without glands or lymph nodules

36
Q

What is the histological marker of the duodenum?

A

Brunner’s glands in submucosa

37
Q

What is the function of Brunner’s glands?

A

Mucous secreting

38
Q

Where will you see an increase in goblet cells in the SI?

A

Ileum

39
Q

What are histological features of the large intestines?

A

No villi
More goblet cells
Teniae coli