In this study, formation of the portal vein and vessels joining to the portal vein were investigated in kangal dog. For this purpose, eight adult kangal dog were used as a material.

Portal vein was formed by the splenic, cranial and caudal mesenteric veins. It was seen that, the gast-roduondenal and right gastric veins enter the portal vein. It was observed that the cranial mesenteric vein is thicker than the splenic and caudal mesenteric veins in kangal dog.

The cranial mesenteric vein was formed by the caudal pancreaticoduodenal, jejunal, ileal, ileocolic, right and middle colic veins in kangal dog.

The splenic vein was formed by the pancreatic vein, right and breve gastric veins and left gastroepiploic vein.

The caudal mesenteric vein was formed by the left colic and cranial rectal veins in kangal dog.