1. What role do the chordae tendineae and papillary muscles play in the normal function of the AV valves?
2. Describe the three distinct layers that make up the heart wall.
3. What are the valves in the heart, and what is the function of each?
4. Trace the normal pathway of an electrical impulse through the conducting system of the heart.
5. What is the cardiac cycle? What phases and events are necessary to complete a cardiac cycle?
6. What three factors regulate stroke volume to ensure that the left and right ventricles pump equal volumes of blood?

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