Concept:Understanding the four chambers of the human heart and their role in blood circulation.Explanation:The human heart has four chambers: the right atrium, the right ventricle, the left atrium, and the left ventricle.The right atrium receives deoxygenated blood from all parts of the body.From the right atrium, this deoxygenated blood moves into the right ventricle.The right ventricle then pumps this blood to the lungs for oxygenation.Meanwhile, the left atrium receives oxygenated blood from the lungs.This oxygenated blood then flows into the left ventricle.Finally, the left ventricle pumps the oxygenated blood to the rest of the body.Therefore, deoxygenated blood from the body parts is collected into the right atrium.Answer:C. Right atrium