ANATOMY

Detailed explanation-1: -Deoxygenated blood from the lower half of the body enters the heart from the inferior vena cava while deoxygenated blood from the upper body is delivered to the heart via the superior vena cava. Both the superior vena cava and inferior vena cava empty blood into the right atrium.

Detailed explanation-2: -After oxygenation, the oxygenated blood returns to the left atrium through the pulmonary vein which then further passes on to the left ventricle. Thus the right side of the heart carries deoxygenated blood and the left side of the heart carries oxygenated blood.