What are the four chambers of the heart?

The four chambers of the heart consist of two atria and two ventricles: the left atrium, the left ventricle, the right atrium, and the right ventricle. In the correct configuration, the left atrium receives oxygenated blood from the lungs, which is then pumped into the left ventricle. This ventricle is responsible for pumping this oxygen-rich blood out to the rest of the body. On the other side, the right atrium receives deoxygenated blood returning from the body and transfers it to the right ventricle, which pumps it to the lungs for oxygenation.

This anatomical arrangement is essential for effective circulation, as it allows for the separation of oxygenated and deoxygenated blood, ensuring that oxygen-depleted blood is sent to the lungs while oxygen-rich blood is circulated throughout the body. The specific order of the chambers matters because it highlights the efficient flow of blood through the heart and the critical roles of each chamber in this process. Each of the choices provided lists a combination of the four chambers, but only the correct answer accurately represents the standard anatomical sequence of the heart's structure.