circulatory system

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Across
  1. 3. lower chambers of the heart
  2. 5. another term for platelets
  3. 7. another term for red blood cells
  4. 9. largest vein in the body, carries blood to the heart
  5. 11. tiny blood vessels that connect arterioles and venules, exchanges oxygen and carbon dioxide
  6. 13. innermost layer of the heart
  7. 14. muscle layer of the heart
  8. 15. blood vessel that goes towards the heart
Down
  1. 1. blood vessels that takes deoxygenated blood to the lungs
  2. 2. blood vessels that takes oxygenated blood to the heart
  3. 4. blood vessel that goes away from the heart
  4. 6. outside layer of the heart
  5. 8. upper chambers of the heart
  6. 10. largest artery in the body, pumps blood to the body
  7. 12. another term for white blood cells