Blood supply to GI tract

Question 1

Esophagus

Answer 1

cervical - carotid a
thoracic - bronchoesophageal a
gastric a

Question 2

Stomach

Answer 2

Celiac a
3 main branches for stomach
Hepatic –> gastroduodenal -> stomach
Splenic –> Left and right gastro-epiploic -> stomach
Left gastric artery -> stomach

Venous drainage
Gastric vein -> portal vein

Question 3

Duodenum

Answer 3

Celiac -> hepatic ->gastroduodenal

Distally - Cranial mesenteric

Potential for collateral circulation

Venous drainage
Cranial mesenteric vein -> portal vein

Question 4

Jejunum

Answer 4

Cranial mesenteric artery -> jejunal arteries in arcades

Venous drainage
Jejunal vein -> portal vein

Question 5

Ileum

Answer 5

Cranial mesenteric -> ileocecocolic a. -> ileal artery – anastomoses with last jejunal artery

Question 6

Cecum

Answer 6

Cranial mesenteric a -> ileocolic a -> medial and lateral cecal arteries

Cranial mesenteric a -> ileocolic a -> medial and lateral cecal arteries -> cecal rete-> submucosal plexus -> marginal artery

Medial a = main supply to apex

Question 7

Ventral Colon

Answer 7

Cranial mesenteric artery -> ileocolic artery -> colic branch

Question 8

Dorsal Colon

Answer 8

Cranial mesenteric a -> short common trunk of right and middle colic -> right colic artery

Question 9

Transverse colon

Answer 9

Cranial mesenteric artery -> middle colic a

anastomoses with left colic a

Question 10

Small colon

Answer 10

Orad 75%
Caudal mesenteric a -> left colic artery

Aborad 25%
Caudal mesenteric a -> cranial rectal a

Question 11

Rectum

Answer 11

Caudal mesenteric a -> cranial rectal a