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Anatomy > L5 “small Intestine” > Flashcards

L5 “small Intestine” Flashcards

1
Q

The longest part of the alimentary canal?

A

Small intestine

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2
Q

Small intestine extend from ……. To …… ?

A

Pylorus of stomach to the ileocecal junction

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3
Q

Parts of small intestine?

A

Duodenum, Jejunum, Ileum

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4
Q

Fixed part (Retro peritoneal) with no mesentery

A

Duodenum

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5
Q

Free (movable) part with mesentery

A

Jejunum and ileum

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6
Q

Shape of duodenum

A

C shaped loop

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7
Q

Length of duodenum

A

10 inches

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8
Q

Beginning of duodenum?

A

At pyloro-duodenal junction

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9
Q

Termination of duodenum?

A

At duodenum-jejunal flexure

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10
Q

Peritoneal covering of duodenum?

A

Retroperitoneal

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11
Q

Parts of duodenum?

A

1.Superior (2inch)
2.Descending (3inch)
3.inferior (4inch)
4.ascending (1inch)

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12
Q

Relation of first part of duodenum

A

Anteriorly: Liver

Posterior: Bile duct, Gastroduodenal artery, portal vein

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13
Q

Relation of second part of duodenum?

A

Anterior:
liver, transverse colon, small intestine

Posterior:
right kidney

Lateral:
Right colic flexure

Medial:
Pancreas

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14
Q

Common opening of bile duct and main pancreatic duct?

A

Summit of major duodenal papilla

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15
Q

Opening of accessory pancreatic duct

A

“One inch higher” on minor duodenal papilla

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16
Q

Duodenum derived from?

A

Foregut and midgut

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17
Q

Arterial supply of small intestine

A

Celiac and superior mesenteric arteries.

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18
Q

Venous drainage of small intestine

A

Superior mesenteric and portal veins

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19
Q

Lymphatic drainage of small intestine

A

Celiac and superior mesenteric lymph nodes

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20
Q

Ligament of Treitz supports and anchors?

A

Duodenum (the first part of the small intestine) and helps move content along the GIT

21
Q

Most common site for peptic ulcer

A

First part of duodenum

22
Q

Which part is vulnerable?

A

3rd part as it lies anteriorly to vertebral column

23
Q

Shape of jejunum and ileum

A

Coiled tube

24
Q

Length of jejunum and ileum

A

6 meters

25
Q

Beginning of jejumum and ileum

A

Duodeno-jejunal flexure

26
Q

Termination of Jejunum and ileum

A

At ilieo-caecal junction

27
Q

Embryological origin of Jejunum and ileum

A

Midgut

28
Q

Blood supply of Jejunum and ileum

A

Superior mesenteric A and V

29
Q

Lymphatic drainage of Jejunum and ileum

A

Superior mesenteric lymph nodes

30
Q

Length of jejunum

A

Shorter 2/5 of si

31
Q

Length of ileum

A

Longer (3/5of) si

32
Q

Appearance of jejunum

A

Dark red (more vascular)

33
Q

Vessels of jejunum

A

High and less arcades (long terminal branches)

34
Q

Mesenteric fat of jejunum

A

Small amount and away from intestinal border

35
Q

Lymphoid tissue of jejunum

A

Few aggregations

36
Q

Diameter of jejunum

A

Wider

37
Q

Wall of jejunum

A

Thicker (more plicae circulares)

38
Q

Diameter of
Ileum

A

Narrower

39
Q

Wall of ileum

A

Thinner (less plicae circulares)

40
Q

Appearance of ileum

A

Light red (less vascular)

41
Q

Vessels of ileum

A

Low and more arcades (short terminal branches)

42
Q

Mesenteric fat of ileum

A

Large amount no close to intestinal border

43
Q

Lymphoid tissue

A

Numerous aggregations

44
Q

Extent of mesentery of small intestine

A

From dudeonojejunal flexure to ileocecal junction

45
Q

Formation mesentery of small intestine

A

2 layers

46
Q

Free border of mesentery of small intestine

A

Encloses jejunum and ileum

47
Q

Root of mesentery of small intestine

A

Crosses superficial to the following structures:

1.third part of duodenum
2.abdominal aorta
3.inferior vena cava
4.right psoas major
5.right ureter

48
Q

Content of mesentery of small intestine?

A

-superior mesenteric artery
-superior mesenteric vein
-coils of the small intestine
-extraperitonal tissue and fat
-sympathetic nerve fibers
-Mesenteric LN (arranged in three groups: large, medium, and small)

Anatomy (8 decks)

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