Cardiovascular System Crossword Puzzle

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Across
  1. 2. Smallest blood vessel where exchange of gases occurs
  2. 5. Blood vessel that carries blood toward the heart
  3. 6. Cell fragment that helps with blood clotting
  4. 9. Blood vessel that carries oxygenated blood from lungs to heart
  5. 11. Inner lining of the heart chambers
  6. 12. Blood vessel that carries deoxygenated blood from heart to lungs
  7. 14. White blood cell involved in immune response
Down
  1. 1. Muscular layer of the heart wall
  2. 3. Largest artery in the body
  3. 4. Lower chamber of the heart that pumps blood
  4. 5. Large vein that carries deoxygenated blood to the heart
  5. 7. Blood vessel that carries blood away from the heart
  6. 8. Protective sac surrounding the heart
  7. 10. Upper chamber of the heart that receives blood
  8. 13. Red blood cell responsible for carrying oxygen