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Anatomy · Abdomen
Sample itemThe portal vein is usually formed by union of which two veins?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
B. Superior mesenteric and splenic veins
The portal vein is generally formed posterior to the neck of the pancreas by the union of the superior mesenteric and splenic veins, carrying nutrient-rich blood from the gut to the liver.
Option by option
A. Femoral and iliac veins
Femoral and iliac veins are lower-limb systemic veins.
B. Superior mesenteric and splenic veins (correct)
Correct: superior mesenteric and splenic veins form the portal vein.
C. Inferior vena cava and renal vein
The inferior vena cava receives systemic venous return, not portal formation.
D. Hepatic and portal veins
Hepatic veins drain liver blood into the inferior vena cava.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.