The Heart and Circulation

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27. Label the diagram of cardiac muscle contraction.28. What is another name for a single heart beat?29. What is systole and diastole?30. What are the heart sound and what causes them?31. Name the two numbers that make up blood pressure and discuss the actions of theheart that cause each number.32. The fact that the nervous system does not control the heartbeat, but that the heartbeats all on its own is called what?33. What part of the conducting system of the heart is called the natural cardiacpacemaker? Why is it called this?
34. What is the role of the atrioventricular node (AV node)?35. What parts of the nervous system do have an effect upon the action of the heart?36. Discuss the actions of the heart that cause each part of an EKG wave.37. Label the following EKG wave.
Page 1 and 2: 1. What is another name for an arte
Page 3 and 4: 21. Identify the two semilunar valv

The Heart and Circulation

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