Which chamber of the heart receives oxygen-poor blood from the body?

The right atrium is the chamber of the heart that receives oxygen-poor blood from the body. Blood returning from the systemic circulation enters the heart through two large veins: the superior vena cava and the inferior vena cava. The superior vena cava brings deoxygenated blood from the upper body, while the inferior vena cava carries blood from the lower body.

Once this oxygen-poor blood enters the right atrium, it is then channeled into the right ventricle, which subsequently pumps it to the lungs for oxygenation. This process is crucial as it ensures that blood is replenished with oxygen before being circulated to the rest of the body. Understanding this flow of blood is essential for grasping the overall function of the heart and the circulatory system.