Cardiovascular System

123456789101112131415
Across
  1. 4. largest artery in the body
  2. 6. lower tip of the heart
  3. 8. partition or wall dividing a cavity
  4. 9. record of electrical activity of the heart
  5. 10. innermost lining of blood vessels
  6. 12. muscular middle layer of the heart
  7. 14. Thin-walled vessel that carries blood from body tissues and lungs back to the heart
  8. 15. relaxation phase of the heartbeat
Down
  1. 1. double-layered membrane surrounding the heart
  2. 2. inner lining of the heart
  3. 3. contraction phase of the heartbeat
  4. 5. small vein
  5. 7. smallest type of blood vessel
  6. 11. beat of the heart as felt through the walls of the arteries
  7. 13. one of the two lower chambers of the heart