Page 408 - First Aid for the USMLE Step 1 2020, Thirtieth edition [MedicalBooksVN.com]_Neat

364 seCtion iii Gastrointestinal ` gastrointestinal—anatomy Gastrointestinal ` gastrointestinal—anatomy

Gastrointestinal blood supply and innervation
embryoniC ParasymPatHetiC Vertebral
gUt region artery innerVation leVel strUCtUres sUPPlieD
Foregut Celiac Vagus T12/L1 Pharynx (vagus nerve only) and lower esophagus
(celiac artery only) to proximal duodenum;
liver, gallbladder, pancreas, spleen (mesoderm)
Midgut SMA Vagus L1 Distal duodenum to proximal 2/3 of transverse
colon
Hindgut IMA Pelvic L3 Distal 1/3 of transverse colon to upper portion of
anal canal

Celiac trunk Branches of celiac trunk: common hepatic, splenic, and left gastric. These constitute the main
blood supply of the foregut.
Strong anastomoses exist between:
ƒ Left and right gastroepiploics
ƒ Left and right gastrics

Abdominal aorta
Celiac trunk
Left hepatic Esophageal branches
Left gastric
Short gastric
Splenic
Right hepatic

Cystic
Left gastroepiploic

Proper hepatic
Common hepatic
“Anastamoses”
Gastroduodenal
Anterior superior pancreaticoduodenal Areas supplied by:
Posterior superior pancreaticoduodenal Left gastric artery

Splenic artery
Right gastric
Right gastroepiploic Common hepatic artery

FAS1_2019_09-Gastrointestinal.indd 364 11/7/19 4:42 PM