What is the upper champers of the heart?

The upper chambers of the heart are known as the atria, which consist of the left atrium and the right atrium. The right atrium receives deoxygenated blood from the body through the superior and inferior vena cavae, while the left atrium receives oxygenated blood from the lungs via the pulmonary veins. These chambers play a crucial role in filling the lower chambers (ventricles) with blood before contraction. The atria also help regulate blood flow and maintain efficient circulation throughout the heart.