Question

Which of the following veins return blood DIRECTLY into the RA?

A) SVC and IVC
B) Pulmonary veins
C) Femoral vein
D) Subclavian vein
E) Internal jugular vein

Answer 1

The superior vena cava and inferior vena cava are the veins that return blood directly into the right atrium; the correct answer is A) SVC and IVC.

Step-by-step explanation:

The veins that return blood directly into the right atrium (RA) of the heart are the superior vena cava (SVC) and the inferior vena cava (IVC). The superior vena cava carries blood from the upper part of the body including the head, neck, chest, and arms, while the inferior vena cava carries blood from the lower parts of the body including the legs and abdomen. These two largest veins are the primary conduits for blood returning to the right atrium from systemic circulation. Therefore, the correct answer to which of the following veins return blood directly into the RA is A) SVC and IVC.