Cardiovascular system

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Across
  1. 7. This study is a recording of the flow of electrical impulses that travel through the heart.
  2. 8. During this phase of the heartbeat, the heart contracts and pumps blood.
  3. 10. The ___________ cycle includes the events on a heartbeat.
  4. 12. These blood vessels carry blood away from the heart.
Down
  1. 1. Heart condition where the heart beats slower than normal.
  2. 2. The ____________ node starts each heartbeat. Its also known as the pacemaker.
  3. 3. The sounds in the heart are caused by the opening and closing of its __________.
  4. 4. One of the main factors that lead to high blood pressure.
  5. 5. During this phase of the heartbeat, the heart relaxes and fills with blood.
  6. 6. These blood vessels that bring blood to the heart.
  7. 9. Heart condition that causes a rapid heart rate.
  8. 11. The orderly passage of electrical current sequentially through the heart muscle, changing it, cell by cell.