Circulatory Pathways

The arterial system involves aorta, arteries, arterioles and meta-arterioles. The aorta turns towards the back of heart and finally converts into dorsal aorta, abdominal aorta gives off several pairs of arteries, some of them are:
[a] Coeliac artery: Unpaired, divides into three branches.
(i) Left gastric artery: To stomach.
(ii) Common hepatic artery: To pylorus, pancreas, gall bladder, liver, cystic duct, hepatic ducts etc.
(iii) Splenic artery: To pancreas, stomach and spleen.
[b] Anterior or Superior mesenteric:
Unpaired, supplies various parts of small intestine (except superior part of duodenum part of colon and caecum). Its sub branches are:
(i) Pancreo duodenal artery: To pancreas and duodenum.
(ii) Jejunal artery: To jejunum.
(iii) Ilial artery: To ileum and jejunum.
(iv) Iliocolic artery: To ileum and colon.