What blood vessel is a tributary of the hepatic portal vein?Multiple ChoiceRenal v.Splenic v.Internal iliac v.Hepatic v.

Step 1: Break Down the Problem

The question asks for the identification of a blood vessel that acts as a tributary of the hepatic portal vein from the provided multiple-choice options.

Step 2: Relevant Concepts

The hepatic portal vein is formed by the convergence of several veins that drain blood from the gastrointestinal tract and spleen. The major tributaries of the hepatic portal vein include the splenic vein, superior mesenteric vein, and inferior mesenteric vein.

Step 3: Analyze Each Option

1. Renal vein: Drains blood from the kidneys, not a tributary of the hepatic portal vein.
2. Splenic vein: Drains blood from the spleen and is a direct tributary of the hepatic portal vein.
3. Internal iliac vein: Drains blood from the pelvis and lower limbs, not a tributary of the hepatic portal vein.
4. Hepatic vein: Drains blood from the liver to the inferior vena cava, not a tributary of the hepatic portal vein.

Step 4: Verify and Summarize

From the analysis, the only correct option that acts as a tributary to the hepatic portal vein is the splenic vein. The chosen option fully aligns with the anatomical knowledge of the hepatic portal system.

Final Answer

The correct answer is the Splenic vein.