Cardiovascular System

The Heart

What are the main vessels entering and leaving the heart?

The main vessels entering the right side of the heart are the inferior and superior vena cava, which return low-oxygen blood to the right atrium. Blood leaves the right ventricle through the pulmonary artery to the lungs. High-oxygenated blood returns to the left atrium through the left and right pulmonary veins. All blood exits the left side of the heart through the aorta.


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