All blood returns to the heart by way of either the superior vena cava or the inferior vena cava.

Name: All blood returns to the heart by way of either the superior vena cava or the inferior vena cava.
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Quizplus · Accepted Answer

Not all blood returns to the heart through the superior or inferior vena cava; some blood from the heart and lungs returns through the coronary sinus and pulmonary veins, respectively.

All Blood Returns to the Heart by Way of Either