Which circulation moves blood from the heart to the lungs for oxygenation?

• A. Pulmonary circulation
• B. Systemic circulation
• C. Coronary circulation
• D. Portal circulation

Answer: (A)

Blood moving from the heart to the lungs for oxygenation happens through the pulmonary circuit. In this pathway, the right ventricle pumps deoxygenated blood into the pulmonary arteries, which carry it to the lungs where gas exchange occurs. The blood becomes oxygenated and returns to the heart via the pulmonary veins into the left atrium. This route is dedicated to sending blood to the lungs and back, separate from systemic circulation that supplies the rest of the body, coronary circulation that nourishes the heart muscle, or portal circulation that channels blood from the gut to the liver. Because the question specifies moving blood from the heart to the lungs for oxygenation, the pulmonary circuit is the correct description.