GI System

Question 1

What two organs exist in more than one GI boundary?

Answer 1

Duodenum (first part is foregut. Second, third and fourth part is midgut)

Transverse colon (start is midgut, end is hindgut)

Question 2

What vertebral regions does the abdominal aorta cover?

Answer 2

L1-L4 (sometimes L5)

Question 3

What 3 arteries branch off of the abdominal aorta?

Answer 3

Celiac Trunk

Superior Mesenteric Artery (SMA)

Inferior Mesenteric Artery (IMA)

Question 4

What GI region does the Celiac Trunk supply?

Answer 4

The foregut

Question 5

What GI region does the SMA (superior Mesenteric artery) supply?

Answer 5

Midgut

Question 6

What GI region does the IMA (inferior Mesenteric artery) supply?

Answer 6

Hindgut

Question 7

What does the celiac trunk supply and what are its major branches?

Answer 7

The foregut, liver, gall bladder, and spleen

Branches
1)L. Gastric a.

2) splenic a.
- L. Gastroomental a.
- short gastric a.
- pancreatic branches
- don’t forget spleen!!!

3) common hepatic a.
- hepatic a. Proper
- R. Gastric a.
- gastroduodenal a.
- —–R. Gastroomental a.
- —–superior pancreatico-duodenal a.
- —–duodenal branches

Question 8

What does the SMA (superior Mesenteric artery) supply and what are its branches?

Answer 8

The midgut, 2nd/3rd/4th part of duodenum, jejunum, ileum, cecum, ascending colon, and the first part of transverse colon

Branches:
1)inferior pancreatico-duodenal a.

2) R. Colic a.
3) ileocolic a.
4) middle colic a.
5) jejunum and ileal arteries

Question 9

What does the IMA (inferior Mesenteric artery) supply and what are its branches?

Answer 9

The hindgut, descending colon, sigmoid colon, and rectum

Branches

1) L. Colic a.
2) sigmoid arteries
3) superior rectal a.

Question 10

What runs under the SMA?

Answer 10

The third part of the duodenum