10.7 Crossword Puzzle Challenge Part 1

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Across
  1. 4. Contraction phase of the heartbeat
  2. 7. Largest artery in the body
  3. 9. Relaxation phase of the heartbeat
  4. 10. One of two lower chambers of the heart
  5. 11. Small artery
  6. 12. One of two upper chambers of the heart
  7. 15. Double-layered membrane surrounding the heart
Down
  1. 1. Beat of the heart as felt through the walls of the arteries.
  2. 2. Relaxation phase of the heartbeat
  3. 3. arteries Blood vessels that branch from the aorta and carry oxygen-rich blood to the heart muscle.
  4. 5. Structure in veins or in the heart
  5. 6. Inner lining of the heart
  6. 8. Small vein
  7. 13. Abnormal swishing sound caused by improper closure of the heart valves
  8. 14. Innermost lining of blood vessels