3. Which chambers are the pumping chambers of the heart?

The pumping chambers of the heart are the ventricles. There are two ventricles in the heart: the right ventricle and the left ventricle. The right ventricle pumps deoxygenated blood to the lungs via the pulmonary artery, while the left ventricle pumps oxygenated blood to the rest of the body through the aorta.