Circulatory System

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Across
  1. 2. when the heart muscle contracts
  2. 3. when the heart muscle relaxes
  3. 6. very small blood vessel that branches off from your artery and carries blood away from your heart to your tissues and organs
  4. 11. blood vessels located throughout your body that collect oxygen-poor blood and return it to your heart
  5. 13. the system of transportation that shunts de-oxygenated blood from the heart to the lungs to be re-saturated with oxygen
  6. 14. responsible for clotting blood
  7. 16. very small blood vessels that connect your capillaries with your veins throughout your body
  8. 18. a fibrous sac that encloses the heart
  9. 23. provides the functional blood supply to all body tissue
  10. 25. the smallest type of blood vessel
Down
  1. 1. combats antigens
  2. 4. thin walled chambers that receive blood from the veins
  3. 5. tip or summit of an organ
  4. 7. red blood cells (rbc)
  5. 8. protein inside rbc that carries oxygen from the lungs to other organs
  6. 9. white blood cels (wbc)
  7. 10. carries blood cells
  8. 12. the muscle layer of the heart
  9. 15. toxins or bacteria that come from outside the body
  10. 17. the blood vessels that deliver oxygen-rich blood from the heart to the tissues of the body
  11. 19. thin, smooth tissue that makes up the lining of the chambers and valves of the heart
  12. 20. amount of whole blood that is made up of rbc
  13. 21. muscular chamber that pumps blood out of the heart and into the circulatory system
  14. 22. liquid connective tissue
  15. 24. outermost, protective layer of the heart