Hepatic artery proper
The hepatic artery proper splits off of the common hepatic artery. For part of its course, it runs near the portal vein and the common bile duct. As a result, it forms part of the structure know as the portal triad, which also includes lymphatic vessels and a branch of the vagus nerve. In this respect, the word "triad" is misleading, as the structure contains more than three elements. Historically, the distinction changed over the years as anatomical components were added. Also, the hepatic artery proper gives off branches such as the supraduodenal, which runs a course to the duodenal bulb. Also, the artery branches into the right gastric artery, which travels around the lesser curve of the stomach. The hepatic artery proper should not be taken as the hepatic veins. Those are blood vessels that remove deoxygenated blood from the liver. All the veins around the hepatic artery proper work towards the same objective: all deoxygenated blood must be conveyed back to the lungs and the heart.
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In Depth: Hepatic artery proper