In mammals, blood returning from the head will pass through the ________ just before entering the right atrium.
A) left atrium
B) superior vena cava
C) inferior vena cava
D) aorta

Question

Quizplus · Accepted Answer

The superior vena cava is a large vein that brings deoxygenated blood from the upper body, including the head, to the right atrium of the heart. Therefore, blood returning from the head will pass through the superior vena cava just before entering the right atrium.

In Mammals, Blood Returning from the Head Will Pass Through