Which vein returns blood to the right atrium from the upper half of the body?

• A. Superior Vena Cava
• B. Inferior Vena Cava
• C. Internal Jugular
• D. Pulmonary Vein

Answer: (A)

The main idea here is knowing which large central vein collects blood from the upper body and returns it to the heart’s right atrium. Blood from the head, neck, and upper limbs drains into the superior vena cava, which then empties directly into the right atrium. This makes it the primary conduit for returning deoxygenated blood from the upper half of the body.

In contrast, the inferior vena cava carries blood from the lower body to the right atrium, the pulmonary veins send oxygenated blood from the lungs to the left atrium, and the internal jugular drains the head/neck tissues into the brachiocephalic veins (which are upstream to the superior vena cava), rather than delivering blood directly to the right atrium.