Hepatic Portal System | Human Anatomy

Hepatic Portal System

The hepatic portal system is the venous system that returns blood from the digestive tract and spleen to the liver (where raw nutrients in blood are processed before the blood returns to the heart). Essentially, it drains the structures supplied ultimately by the celiac (except for the gonads), anterior mesenteric, gastrosplenic, and posterior mesenteric arteries. Thus, the branches of the hepatic portal system closely follow many of the branches of these arteries, and it is convenient to study them following your identification of the arteries. In some specimens the hepatic portal system is injected with yellow latex, which greatly facilitates its study. You may follow its branches in an uninjected specimen, but also briefly examine a shark that has the system injected.

The main vessel of the hepatic portal system is the hepatic portal vein a large vein that lies in the gastrohepatoduodenal ligament alongside the hepatic artery and anterior part of the bile duct. The hepatic portal vein is formed by the confluence of three main vessels, the gastric, pancreaticomesenteric, and lienomesenteric veins. They unite to form the hepatic portal vein near the anterior tip of the dorsal lobe of the pancreas. Recall that the celiac artery splits into its branches very near this point as well. Occasionally, the gastric and lienomesenteric veins join to form a very short vessel that then unites with the pancreaticomesenteric to form the hepatic portal vein.

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[malikans]

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[Glittring]

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[FramanHajano]

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[palwashakhan]

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[topern]

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[weeb_anime]

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[mumtazmemon]

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[BibaajaniiBibaajanii]

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[Dubeyji.special]

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[akashchoudhurya]

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[ZulifqarAli-vb]

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[pragyanchhatar]

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[areeba]

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