In what order does blood flow through the heart?

The correct sequence of blood flow through the heart is best represented by the choice that starts from the body, moves to the right atrium, then to the right ventricle, proceeds to the lungs for oxygenation, returns to the left atrium, and finally enters the left ventricle before being pumped out to the body.

This sequence is crucial for understanding the circulatory system. Blood that has circulated through the body returns deoxygenated to the right atrium from the systemic circulation. It then flows into the right ventricle, which pumps it through the pulmonary arteries to the lungs, where carbon dioxide is exchanged for oxygen. The now oxygenated blood returns to the left atrium, moves into the left ventricle, and is subsequently distributed throughout the body via the aorta.

Understanding this flow is essential for grasping how the heart functions as a pump in the circulatory system. The other options do not accurately describe the flow of blood through the heart, misplacing the sequence and leading to a misunderstanding of how the right and left sides operate distinctly in the context of pulmonary and systemic circulation.