Blood returns from the upper part of the body to the heart via which blood vessel?

Blood returns from the upper part of the body to the heart via the Superior Vena Cava. Here are the steps of how this happens:

1. Oxygen-depleted blood from the upper parts of the body, such as the head, neck, arms, and chest, flows into smaller veins, which in turn merge into larger ones.

2. These larger veins combine to form the Superior Vena Cava, the largest vein in the upper part of the body.

3. The Superior Vena Cava carries this deoxygenated blood back to the right atrium of the heart.

4. From the right atrium, the blood is then pumped into the right ventricle.

5. The right ventricle pumps the blood to the lungs via the pulmonary artery where it gets oxygenated.

6. The oxygen-rich blood then returns to the heart and is pumped to the rest of the body.