The two upper chambers of the heart that receives blood are what?

The two upper chambers of the heart that receive blood are the atria. The right atrium receives deoxygenated blood from the body via the superior and inferior vena cavae, while the left atrium receives oxygenated blood from the lungs through the pulmonary veins. These chambers play a crucial role in ensuring that blood is properly directed to the lower chambers, the ventricles, for circulation.