The right atrium receives oxygen-poor blood from the body.
Explanation:
1. Oxygen-poor blood, also known as deoxygenated blood, has already circulated through the body and delivered oxygen to the tissues. It now needs to return to the heart to receive fresh oxygen.
2. The blood enters the heart through the superior vena cava and inferior vena cava, which are large veins that carry deoxygenated blood from the upper and lower parts of the body, respectively.
3. The superior vena cava brings deoxygenated blood from the upper body, such as the head, neck, and arms, while the inferior vena cava carries deoxygenated blood from the lower body, including the abdomen, pelvis, and legs.
4. Both the superior and inferior vena cava empty into the right atrium of the heart, allowing the deoxygenated blood to enter the right side of the heart for further circulation to the lungs where it will pick up oxygen and release carbon dioxide.
