Small intestine Flashcards

1
Q

Where do the small intestines begin?

A

After the pyloric sphincter

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2
Q

Where do the small intestines end?

A

Ileo-caecal junction

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3
Q

What are the parts of the small intestines?

A

Duodenum

Jejunum

Ileum

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4
Q

How does the duodenum relate to the peritoneum?

A

It is mostly retroperitoneal

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5
Q

What are the parts of the duodenum?

A

Superior

Descending

Inferior

Ascending

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6
Q

What structures are anterior to the superior part of the duodenum?

A

Liver

Gall bladder

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7
Q

What is attached to the superior part of the duodenum?

A

Hepatoduodenal ligament of lesser omentum

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8
Q

What structures is the descending part of the duodenum anterior to?

A

Anterior to the right kidney

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9
Q

What structures is the descending part of the duodenum posterior to?

A

Transverse colon

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10
Q

What structures is the descending part of the duodenum on the left to?

A

Head of pancreas

IVC

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11
Q

What feeds into the descending part of the duodenum?

A

Ampulla of vater

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12
Q

Where on the descending part of the duodenum does the ampulla of vater feed into it?

A

Major duodenal papilla

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13
Q

What structures is the ascending part of the duodenum adjacent to?

A

Aorta

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14
Q

What does the ascending part of the duodenum ascend up to?

A

Inferior border of body of pancreas

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15
Q

What structures is the inferior part of the duodenum anterior to?

A

IVC

Aorta

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16
Q

What structures is the inferior part of the duodenum inferior to?

17
Q

What structures is the inferior part of the duodenum posterior to?

A

Superior mesenteric artery and vein

18
Q

What is the name of the junction between the duodenum and the jejunum?

A

Duodenojejunal flexure

19
Q

What shape is the duodenum?

20
Q

Where does the jejunum begin?

A

Duodenojejunal flexure

21
Q

Where does the jejunum end? Where does the ileum begin?

A

No clear demarcation between the jejunum and ileum

22
Q

How do the jejunum and ileum relate to the peritoneum?

A

Both intraperitoneal

23
Q

What else does the mesentery attaching to the jejunum and ileum attach to?

A

Posterior abdominal wall

24
Q

How does the mesentery of the jejunum and ileum attach to the posterior abdominal wall?

A

In an obliquely inferior direction to the right

from the duodenojejunual flexure to the ileocaecal valve

25
Where are the blood vessels supplying the jejunum and ileum located?
In the mesentery of the jejunum and ileum
26
What is the arrangement of blood vessels supplying the jejunum and ileum?
Form loops, called arcades Straight arteries branch off, called vasa recta
27
How do the walls of the jejunum and ileum compare to each other?
Jejunum has a thicker wall Ileum has a thinner wall
28
How do the lumens of the jejunum and ileum compare to each other?
Jejunum has a wider lumen Ileum has a narrower lumen
29
How do the blood supplies of the jejunum and ileum compare to each other?
Jejunum has fewer arcades, longer vasa recta Ileum has more arcades, shorter vasa recta
30
How do the colours of the jejunum and ileum compare to each other?
Jejunum is more red Ileum is more pink
32
How do the mesentery of the jejunum and ileum compare to each other?
Jejunum mesentery has less fat in it Ileum mesentery has more fat in it
33
Where does the ileum end?
Ileo-caecal valve
34
How do the plicae circulares of the jejunum and ileum compare to each other?
Jejunum has more, thicker and taller plicae circulares | than ileum