Madison Thatcher Unit 4

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Across
  1. 2. where gas exchange takes place
  2. 5. muscle of the heart
  3. 9. innermost layer of blood vessels
  4. 10. atrioventricular node
  5. 11. cut in top and bottom halves
  6. 15. blood vessel in which the deoxygenated blood flows to the lungs
  7. 16. sinoatrial node
  8. 18. where blood enters the heart from the lungs
  9. 19. pulse from the neck
Down
  1. 1. when the charges return to a resting state
  2. 3. main artery of the body
  3. 4. complete cycle of pumping and filling
  4. 6. first chamber of the heart where deoxygenated blood flows through
  5. 7. pulse from wrist
  6. 8. carry blood to the heart
  7. 11. opening where blood flows between the right atrium and the right ventricle
  8. 12. where all the deoxygenated blood from the upper body goes to the heart
  9. 13. electrocardiogram
  10. 14. carry blood away from the heart
  11. 17. represents oxygen in blood on an EKG
  12. 20. opening in blood vessels