Blood supply to the small intestine

The blood supply to the small and large bowel is derived from the celiac artery and SMA. The celiac axis primarily provides blood flow to the stomach, liver, spleen, and pancreas but is also a source of collateral flow when blood flow in the SMA is reduced. The SMA gives rise to the inferior pancreaticoduodenal artery, the middle colic artery, right colic artery, and many jejunal and ileal branches. The jejunal and ileal branches supply the jejunum and ileum, respectively. The ileocolic artery supplies the distal ileum, cecum, and proximal ascending colon.