Heart Blood Lungs Vessels

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Across
  1. 1. the ventricle with the thickest wall
  2. 4. the artery that carries blood from the heart to the lungs
  3. 7. the pigment present in red blood cells
  4. 9. a waste substance carried in the blood plasma
  5. 10. these cell fragments help clot the blood
  6. 13. these vessels carry blood away from the heart
  7. 14. the hollow part of a blood vessel
  8. 15. where the pacemaker is located
  9. 16. where gas exchange occurs in the lungs
  10. 17. this is what muscles of the heart do to move blood
  11. 19. the small arteries that provide the heart with oxygenated blood
  12. 20. these vessels carry blood into the heart
  13. 21. the fluid part of the blood
  14. 22. the smaller upper chambers of the heart
Down
  1. 2. the term used to describe white blood cells that ingest pathogens
  2. 3. the major vessel that brings blood from the heart to the rest of the body
  3. 5. the dome shaped muscle in the lungs that contracts and flattens when breathing
  4. 6. cava the vessel that brings blood back into the right atrium
  5. 8. the shape of a red blood cell
  6. 11. dioxide one of the waste substances carried in the blood plasma
  7. 12. these structure prevent back flow
  8. 15. this side of the heart has deoxygenated blood
  9. 17. the type of muscle that the heart is made from
  10. 18. smallest blood vessels where exchange occurs