blood vessels of the GI

Question 1

where are the foregut, mid gut and hind gut spanning to and from

Answer 1

foregut; oesophagus to the duodenum
mid gut: major duodenal papilla to the last third of the transverse colon
hindgut: the rest of the transverse colon to the rectum

Question 2

what are the branches off of the abdominal aorta and their spinal levels of their divisions

Answer 2

celiac trunk: T12
superior mesenteric artery: L1
renal and gonadal arteries L2
inferior mesenteric artery: L3
the bifurcation of the aorta to the common iliac arteries: L4

Question 3

what major branch of the aorta supply the foregut, midgut and hindgut

Answer 3

foregut is the celiac trunk\
midgut is the superior mesenteric artery
hindgut is the inferior mesenteric artery

Question 4

what are the three major divisions of the celiac trunk

Answer 4

left gastric artery
common hepatic artery
splenic artery

Question 5

where does the left gastric artery supply

Answer 5

the lesser curvature of the stomach

Question 6

what blood vessels supply the pancreas

Answer 6

the splenic artery is most of it plus the spleen
the gastroduodenal artery is there as well

Question 7

what are the branches off of the splenic artery and where do they supply

Answer 7

pancreatic branches
short gastric artery goes to the fundus of the stomach
left gastroepiploic artery is to the greater curvature of the stomach

Question 8

what does the left gastric artery stem from and whats it supply

Answer 8

comes off of the coeliac trunk and supplies the lesser curvature of the stomach

Question 9

what does the left gastroepiploic artery stem from and what does it supply

Answer 9

comes off of the splenic artery and supplies the greater curvature of the stomach

Question 10

what does the short gastric artery come off of and what does it supply

Answer 10

comes off of the splenic artery and supplies the fundus of the stomach

Question 11

what are the branches of the common hepatic artery and what do they supply

Answer 11

right gastric artery goes to the lesser curvature of the stomach
proper hepatic artery - off of this are the left and right hepatic arteries to the liver, and the cystic artery to the gall bladder
gastroduodenal artery which gives off the right gastroepiploic which supplies the greater curvature of the stomach

Question 12

where does the right gastroepeploic artery come from and what does it supply

Answer 12

it comes from the gastroduodenal artery which comes from the celiac trunk. and it supplies the greater curvature of the stomach

Question 13

where do the cystic artery and the left and right hepatic arteries come from and what do they supply

Answer 13

they all come off of the proper hepatic artery which is from the common hepatic artery.
L&R supply the liver
cystic artery supplies the gall bladder

Question 14

where does the right gastric artery come from and what does it supply

Answer 14

comes off of the common hepatic artery from the celiac trunk. it supplies the lesser curvature of the stomach

Question 15

what are the branches of the superior mesenteric arteries and what do they supply

Answer 15

jejunal arteries - jejunum
ileal arteries - ileum
ileocolic arteries - terminal ileum, cecum and vermiform appendix
right colic artery - ascending colon
middle colic artery - transverse colon (first 2/3)

Question 16

what are the vasa recta

Answer 16

these are small arterial branches off od the intestinal arteries

Question 17

how do the vasa recta differ between the jejunum and the ileum

Answer 17

in the jejunum they are longer whereas the ileum they are shorter

Question 18

where do the jejunal and the ileal arteries stem from and what do they supply

Answer 18

jejunal - jejunum
ileal - ileum
both come from the superior mesenteric artery

Question 19

where does the ileocolic artery come from and whats its supply

Answer 19

supplies the terminal ileum, the cecum and the vermiform appendix. it comes from the superior mesenteric artery

Question 20

where do the right colic artery and the middle colic artery come from and what do they supply

Answer 20

right colic supplies the ascending colon
the middle colic supplies the transverse colon
both come from the superior mesenteric artery

Question 21

what vessels are between the superior mesenteric artery and the inferior mesenteric arteries

Answer 21

the renal arteries and the gonadal arteries

Question 22

what does the inferior mesenteric artery supply

Answer 22

the hind gut. the end of the transverse colon, the left splenic flexure and the rest of the colon to the rectum

Question 23

what are the branches from the inferior mesenteric artery and what do they supply

Answer 23

left colic artery - divides to the ascending branch for the rest of the transverse colon, and the descending branch for the descending colon
the sigmoid artery for the sigmoid colon
superior rectal artery for the rectum.

Question 24

where does the superior rectal artery come from and what does it supply

Answer 24

comes from the inferior mesenteric artery and supplies the rectum

Question 25

where does the sigmoid artery come from and what doesit supply

Answer 25

the sigmoid colon coming from the inferior mesenteric artery

Question 26

where do the ascending branch and descending branch come from and what do they supply

Answer 26

both come from the left colic artery which itself comes from the inferior mesenteric artery the ascending branch supplies the remainder of the transverse colon the descending branch supplies the descending colon

Question 27

what are the marginal arteries

Answer 27

these are anastomoses between the colic arteries. so the left right and middle colic arteries

Question 28

what are the hepatic veins and where do they drain to

Answer 28

these are the left, middle and right hepatic veins draining the lobes of the liver. these all drain into the inferior vena cava

Question 29

as a general rule of thumb what can we say about the venous drainage of the GI system

Answer 29

the IMV, SMV and the splenic vein roughly drain where their arteries supply

Question 30

what makes up the inferior mesenteric vein

Answer 30

the superior rectal vein and the cplic veins

Question 31

what makes the hepatic portal vein

Answer 31

the superior mesenteric vein, the inferior mesenteric vein and the left gastric vein - left gastric a wee bit further up though

Question 32

where does the PNS innervation of the GI system come from

Answer 32

the vagus nerve and the pelvic splanchnic nerve

Question 33

where does the SNS innervation to the GI system come from

Answer 33

the splanchnic nerves which come from the prevertebral arteries

Question 34

what are the sphlanic arterues and their origin

Answer 34

greater - T5-T9 lesser - T10-T11 least - T12

Question 35

where do each of the splanchnic nerves supply

Answer 35

greater T5-T9 - foregut lesser T10-T11 - mid gut least T12 - hindgut