Which part of the heart is responsible for receiving deoxygenated blood from the body?

The right atrium is responsible for receiving deoxygenated blood from the body. This chamber collects blood from two major veins, the superior and inferior vena cavae, which return blood that has delivered oxygen to the body's tissues and is now low in oxygen. The right atrium serves as a holding area for this deoxygenated blood before it passes into the right ventricle, which then pumps it to the lungs for oxygenation. This process is a critical part of the pulmonary circulation, allowing the body to re-oxygenate the blood efficiently.

In contrast, the left atrium receives oxygen-rich blood from the lungs, the left ventricle is responsible for pumping oxygenated blood to the rest of the body, and the right ventricle pumps deoxygenated blood to the lungs, so they do not directly handle deoxygenated blood coming from the systemic circulation.