What are 3 structures found in the heart?

Three key structures found in the heart are the atria, ventricles, and valves. The atria are the two upper chambers that receive blood, while the ventricles are the lower chambers that pump blood out of the heart. The valves, including the mitral and aortic valves, ensure unidirectional blood flow and prevent backflow within the heart. Together, these structures work in harmony to facilitate effective circulation throughout the body.