the cardiovascular system

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Across
  1. 3. main vein responsible for carrying blood back to the heart. superior and inferior
  2. 4. name for artery's and veins connected to the lungs
  3. 8. valve between right atrium and right ventricle
  4. 11. valve between left atrium and left ventricle
  5. 13. a muscular organ that pumps blood
  6. 14. protein with red blood cells that carries oxygen
  7. 15. a low pressure blood vessel that returns de-oxygenated blood back to the heart
Down
  1. 1. the upper chambers of the heart
  2. 2. the lower chambers of the heart
  3. 5. largest artery in the body. connects to the top of the heart and descends downward
  4. 6. small blood vessels which deliver blood directly to parts of the body
  5. 7. node in the heart generates electrical impulses to contract the heart. also known as the "pacemaker"
  6. 9. a high pressure blood vessel that carries blood away from the heart
  7. 10. name of blood cell that carries oxygen. a "blank"- blood cell
  8. 12. fluid that transports oxygen throughout the body