Describe the anatomy of the human heart, highlighting the chambers, valves, and major blood vessels associated with it, and elucidate the cardiac cycle, including systole and diastole, and the role of the heart in maintaining systemic circulation.Describe the anatomy of the human heart, highlighting the chambers, valves, and major blood vessels associated with it, and elucidate the cardiac cycle, including systole and diastole, and the role of the heart in maintaining systemic circulation.