GI blood supply and innervation

Question 1

Foregut

Answer 1

Artery: celiac
Nerve: vagus (para)
Vertebral: T12/L1

Structure supplied: stomach to proximal duodenal, liver, gallbladder, pancreas, spleen (mesoderm)

Question 2

Midgut

Answer 2

Artery: SMA
Nerve: vagus (para)
Vertebral: L1

Structure supplied: distal duodenum to proximal 2/3 of transverse colon

Question 3

Hindgut

Answer 3

Artery: IMA
Nerve: pelvic (para)
Vertebral: L3

Structure supplied: distal 1/3 transverse colon to upper portion of rectum, splenic flexure is a watershed region