GI blood supply

GI blood supply

1. PURPLE = ANASTOMOSES

2. VENOUS DRAINAGE

   • All GI organs drain via hepatic portal vein
     • Pass through liver for metabolism
       • Drain into caudal vena cava
     • EXCEPT - left gastric drains into Splenic not hepatic portal vein
     • Cranial / caudal mesenteries are terminal veins of hepatic portal vein
   • Non GI organs drain directly into caudal vena cava
     • EXCEPT - left testicular vein drains into left renal vein
   • NO celiac vein - hepatic portal vein is in middle of abdomen so no conduit necessary to get to centre

3. ARTERIES

   • Abdominal wall
     • Cranio-dorso-lateral
       • Cranial abdominal
       • Deep external iliac
     • Cranio-ventro-lateral
       • Cranial epigastric
         • Cranio ventral
           • Cranial superficial epigastric
       • Caudal epigastric
         • Caudo-ventral
           • Caudal superficial epigastric
   • Abdominal organs
     • Aorta
       • Cranial abdominal organs
         • Caeliac
           • Hepatic
             • Liver
               • Hepatic branches
             • Right lesser curvature of stomach
               • Right gastric artery
             • Gastroduodenal
               • Right greater curvature of the stomach
                 • Right gastro-epiploic
               • Cranial right lobe of pancreas/ duodenum
                 • Cranial pancreatic-duodenal
           • Left lesser curvature of stomach
             • Left gastric artery
               • Oesophagus
                 • Oesophageal branches
           • Spleen
             • Splenic
               • Greater curvature of the stomach
                 • Short gastric arteries
               • Left lobe of pancreas
                 • Pancreatic branches
               • Left greater curvature of stomach
                 • Left gastro epiplolic
       • Mid-abdominal organs
         • Cranial mesenteric
           • Ileo-colic
             • Transverse colon
               • Middle colic
             • Right colic flexure
               • Right colic
             • Ascending colon
               • Colic branch of ileocolic
             • Caecum
               • Caecal branch of ileo-colic
                 • Ileum
                   • Antimesenteric ileal
             • Ileum
               • Mesenteric ileal
           • Caudal right lobe of pancreas /duodenum
             • Caudal pancreatico-duodenal
           • Jejunum
             • Jejunal arteries
       • Caudal abdominal organs
         • Caudal mesenteric
           • Left colic flexure/ descending colon
             • Left colic
           • Cranial rectum
             • Cranial rectal
     • Kidneys
       • L+R renal arteies
     • Ovaries / Testicles
       • L+R ovarian/testicular arteries