Need help answering and understanding in simple way Explain the difference between the circulatory and cardiovascular systems. Describe location and structural features of the heart. Explain the significance of the intercalated discs connecting the cardiomyocytes. What two different types of intercellular junctions are found within intercalated discs? What do these junctions do?What structures make up the cardiovascular system? Briefly describe each function. What are the different layers of the heart wall? What about the wall of blood vessels? What is the function of each layer? Name the structures of the heart including the chambers, valves, and major blood vessels. What is the fibrous skeleton of the heart and its function? What are the functions of the cardiovascular system? Why is the cardiovascular system important to maintain homeostasis? Describe the flow of blood through the body, lungs, and heart. Include the relative levels of oxygen and carbon dioxide in the blood at various points along the pathway. Why is dynamic and parallel blood flow through the systemic circuits important? How does blood flow through the systemic circuit change during activity? Why? What are the stages of the cardiac cycle? What are systole and diastole? What causes the valves to open or close