Cardiovascular System

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Across
  1. 1. Large vein carrying blood to the heart
  2. 6. Double-layered sac enclosing the heart
  3. 7. Blood vessels that carry oxygenated blood from the lungs to the heart
  4. 9. The main artery carrying blood from the heart to the rest of the body
  5. 10. The muscular middle layer of the heart wall
  6. 12. White blood cells that fight infection
  7. 13. A blood vessel that carries blood away from the heart
  8. 15. Vessels that carry deoxygenated blood for the heart to the lungs
Down
  1. 2. The innermost layer lining the heart chambers
  2. 3. Heart chamber that receives blood
  3. 4. A blood vessel that carries blood towards the heart
  4. 5. A small blood vessel for exchanging materials with tissue
  5. 8. Blood cells that help with clotting
  6. 11. Heart chambers that pump blood out
  7. 14. Red blood cells that call oxygen