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Abdominal Vasculature: Arterial supply Abdominal Aorta The main bld. Supply to the abdomin comes from: Abdominal Aorta Starts in aortic hiatus opposite to T12 Ends opposite to L4 by dividing into: 2 common iliac arteries & ??? Branches of Abd. Aorta Abd. Wall branches: (Parietal) 5 lumbar a. (each side) 1st lumbar = inf. phrenic artery Abd. Cavity branches: (Visceral) 3 anterior 3 lateral 3 terminations 3 anterior: celiac trunk Sup. Mesenteric Inf. Mesenteric 3 lateral: suprarenal renal gonadal (testicular or ovarian) 3 terminations: 2 common iliacs (L4) median sacral a. Celiac Trunk (G, belly) At level of T12 just beneath the hiatus Very short Divides into 3 branches: Lf.: splenic a. (largest) Rt.: common hepatic a. Sup.: left gastric a. (lesser curvature superiorly) Splenic Artery Largest branch of celiac trunk Pass post. to the stomach & sup. to pancreas Enters the ?? ligament to reach the hilum of the spleen Branches: pancreatic arteries (retroperitoneally) short gastric arteries (#5-6, to the fundus) left gastro-epiploic a. (greater curvature on lf.) (synonym: gastro-omental) Splenic Artery Hepatic Artery Rt. Branch of celiac trunk Pass in the Rt. Side to enter the hilum of the liver Part of the portal triad (what is the triad?) Porta Hepatis In the middle of visceral surface Contains: (Portal Triad) Portal vein (in) Hepatic artery (in) Bile duct (out) Hepatic Artery Branches: Rt. Gastric a.: where?? anastomose with ?? Gastroduodenal a.: descends behind duodenum (1st part) gives: Rt. Gastro-epiploic & sup. Pancreaticoduodenal 2 terminations: Lf. Hepatic a. Rt. Hepatic a. cystic a. comes from Rt. Hepatic a. Descreptive Terminology for purposes of description the a. is divided into; Common hepatic artery Hepatic artery proper Rt & Lf hepatic a. Celiac Trunk Branches (Review) Superior Mesenteric Artery Arises: below celiac trunk & just above the Lf. Renal vein descends: post. to neck of ?? Ant. to 3rd part of duodenum Supplies the intestine: from lower ½ of duodenum Until distal 1/3 of transverse colon Relations of Superior Mesenteric Artery Sup. Mesenteric a. Main Branches of Sup. Mesenteric (Read Your Text) 1. Inf. pancreaticoduodenal a. anastomose with sup. Pancreaticoduodenal a. (comes from??) 2. Jejunal & ileal branches. 3. Ileocolic a.: to ileum, cecum & appendix, and part of ascending colon 4 branches ? gives off the appendicular a. from (which artery?) 4. Right colic a.: supplies the ascending colon 5. Middle colic a.: runs forward in ?? to supply proximal 2/3 of transverse colon Superior Mesenteric Branches 1/2 duodenum: Jejunum: Ileum: Ileocecal valve, cecum & appendix: Ascending colon: Proximal 2/3 of transverse colon: Inferior Mesenteric Artery Runs downward to the left After it crosses lf. common iliac a, it becomes the ?? Supplies intestine: From distal 1/3 of transverse colon Upper ½ of Anal canal Runs downward to the left. Branches of Inf. mesenteric a. (Read your text) Lf. Colic: supplies distal 1/3 of trans. Colon & descending colon Sigmoid arteries: 2-3 branches sigmoid colon Superior rectal a.: continuation of inf. mes. a. descends behind the rectum supplies rectum & upper ½ of anal canal