What are four chambers of the body connected by?

The four chambers of the heart—the right atrium, right ventricle, left atrium, and left ventricle—are connected by a series of valves and blood vessels. The atria receive blood from the body and lungs, while the ventricles pump blood out to the lungs and the rest of the body. These chambers are separated by the interatrial septum and interventricular septum, ensuring proper blood flow and preventing mixing of oxygenated and deoxygenated blood. The heart's electrical conduction system also coordinates the contraction of these chambers.