The heart of every human being contains several chambers. These chambers are responsible for obtaining and absorbing blood that comes back to the main organ from the rest of the organism. Health care professionals define these organs as the right and left atria respectively. This is the primary thing one should know about the heart to make sure it functions properly.
Our veins deliver the necessary amount of blood to an atrium. The right and left ventricles are located below. Those are lower chambers of the organ. The red liquid is extracted into these two big chambers while the muscles of the atrium shrink. Ventricles’ muscles also shrink; then, the blood is heaved ahead to the rest of the human body. That is how the heart rhythm (a.k.a. pulse) appears.