Which of These is the Major Tributary of the Superior

Question

Which of these is the major tributary of the superior vena cava?
A) superior mesenteric vein
B) azygous vein
C) left colic vein
D) inferior mesenteric vein
E) splenic vein

Accepted Answer

The azygous vein is the major tributary of the superior vena cava, receiving blood from the thorax, abdomen, and pelvis. The superior mesenteric vein, left colic vein, inferior mesenteric vein, and splenic vein all drain into the portal vein, which ultimately drains into the liver.