The heart is a sophisticated pump that keeps blood moving around the body. It carries oxygen and nutrients to all parts of the body and carries away unwanted waste products including carbon dioxide.
Within the heart, there are four chambers. The two upper chambers are the Atria and the larger lower chambers are known as the Ventricles. As your heart muscle contracts, it pushes blood through your heart. With each contraction or heartbeat, deoxygenated blood flows into the right side of the heart, which pumps it to the lungs to pick up oxygen. The oxygenated blood then returns to the left side and is then transported by the circulatory system to the tissues of the body.