Starla's 10.7 Cardiovascular Puzzle

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Across
  1. 6. mucus
  2. 7. innermost lining of the blood vessels
  3. 8. largest type of blood vessel
  4. 9. muscular middle layer of the heart
  5. 10. smallest type of blood vessel
  6. 12. pacemaker of the heart
  7. 13. pericarium
  8. 14. small vein
Down
  1. 1. small artery
  2. 2. relaxation phase of the heartbeat
  3. 3. lower chambers of the heart
  4. 4. contraction phase of the heartbeat
  5. 5. partition or wall dividing a cavity
  6. 9. valve between the left atrium and the left ventricle
  7. 11. yellowish plaque, fatty substance