Heart Anatomy Crossword

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Across
  1. 6. Largest artery in the body.
  2. 10. These veins & arteries are the pathway to & from the lungs.
  3. 12. The more muscular of the 2 ventricles.
  4. 13. This kind of muscle is in the heart.
  5. 14. The outer layer of the heart.
  6. 16. The heart's "pacemaker."
  7. 17. These lead away from the heart.
  8. 18. The valve between the left atrium & ventricle.
  9. 21. Blood, sans O2.
  10. 23. The innermost layer of the heart.
  11. 24. The vena cava that services the upper body.
  12. 26. This middle layer of the heart is all muscle.
Down
  1. 1. The valve between the right atrium & ventricle.
  2. 2. An irregular heartbeat.
  3. 3. The relaxation phase of a heartbeat.
  4. 4. Receives blood from the body.
  5. 5. This lies between the right ventricle and the pulmonary artery.
  6. 7. The contraction phase of a heartbeat.
  7. 8. Largest vein in the body.
  8. 9. The heart lies at the center of this system.
  9. 11. Diseases of the heart, in short.
  10. 15. This is the wall (septum) between the atria.
  11. 19. Receives blood from the lungs.
  12. 20. The heart has 4 of these.
  13. 22. The heart's circulatory system consists of ____ arteries & veins.
  14. 25. These lead towards the heart.