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Flashcards in The Blood Supply to the Gut Deck (23):
1

What are the three unpaired arteries that supply the GI system?

coeliac trunk, superior mesenteric and inferior mesenteric arteries

2

What are the three main branches of the coeliac trunk?

common hepatic artery (which branches into the hepatic artery proper and the gastroduodenal artery), left gastric artery and splenic artery

3

Describe the branches of the superior mesenteric artery

ileocolic artery , right colic artery and middle colic artery

4

What does the ileocolic branch of the SMA supply?

ileum part of colon

5

What does the right colic branch of the SMA supply?

ascending part of colon

6

What does the middle colic branch of the SMA supply?

transverse colon

7

Where does the coeliac trunk begin?

T12

8

Where does the superior mesenteric artery begin?

L1

9

Where does the inferior mesenteric artery begin?

L3

10

What are 'vasa recta'?

smaller branches of arteries

11

What does the inferior mesenteric artery mainly supply?

descending colon

12

Describe the main branches of the inferior mesenteric artery

left colic artery, sigmoid artery, superior rectal artery and margin artery

13

Describe the two main blood supplies to the liver

75% is hepatic portal vein and 25% is hepatic artery

14

Which four veins meet to form the hepatic portal vein?

left gastric vein, splenic vein, inferior mesenteric vein and superior mesenteric vein

15

Which nerve supplies the parasympathetic innervation to the foregut and midgut?

vagus nerve (X)

16

Which nerve supplies the parasympathetic innervation to the hindgut?

sacral outflow between S2 and S4

17

Which nerve supplies the sympathetic innervation to the foregut?

greater splanchnic nerve

18

Which nerve supplies the sympathetic innervation to the midgut?

lesser and least splanchnic nerve

19

Which nerve supplies the sympathetic innervation to the hindgut?

lumbar splanchnic nerve

20

What is the marginal artery?

artery which links all of the different branches together in a highly anastamotic fashion

21

What does the left colic branch of the IMA supply?

descending colon

22

What does the sigmoid branch of the IMA supply?

sigmoid region of descending colon

23

What does the superior rectal branch of the IMA supply?

top of the rectum