Final answer:
The correct term for the blood flow that goes through the lungs and back to the heart is pulmonary circulation.
Step-by-step explanation:
Blood flow that is directed through the lungs and back to the heart is called pulmonary circulation. This process begins when blood returning from the systemic circuit, which is low in oxygen and high in carbon dioxide, enters the right atrium of the heart. Blood then moves into the right ventricle, which pumps it into the pulmonary circuit for gas exchange in the lungs. After being oxygenated, blood re-enters the heart through the left atrium, then the left ventricle pumps it back into the systemic circuit to distribute it to the rest of the body. The correct answer to the student's question is c) Pulmonary circulation.