Human Circulatory System

Edit Answers
12345678910111213141516171819202122232425262728
Across
  1. 1. Wall separating the two sides of the heart
  2. 6. The blood vessels that connect the arteries and veins
  3. 11. The WBC that engulfs and destroys pathogens
  4. 13. The shape of RBCs that increases their SA:vol ratio
  5. 14. The scientific name for RBCs
  6. 16. A fatty, waxy substance that can form deposits in blood vessels
  7. 18. A blood vessel with a thick wall of muscle fibres and elastic tissues
  8. 19. The artery carrying blood to the body from the heart
  9. 20. WBCs that remain after a primary infection that help to fight off the same infection rapidly if encountered again in the future
  10. 21. The vein returning deoxygenated blood to the heart
  11. 24. A way of becoming “immune” to an infection, without getting ill from it
  12. 25. How gaseous exchange occurs between blood and inhaled air in the lungs
  13. 26. The WBC that produces antibodies
  14. 27. The pump of the circulatory system
  15. 28. The fragments of cells involved in clotting blood
Down
  1. 2. Harmful microorganisms
  2. 3. The vein returning oxygenated blood to the heart
  3. 4. A relaxation of the heart muscle
  4. 5. The liquid part of blood, mainly water
  5. 7. A contraction of the heart muscle
  6. 8. “Markers” on the surface of cells
  7. 9. Valve separating the two chambers in the right side of the heart
  8. 10. Valve separating the two chambers in the left side of the heart
  9. 12. The protein that carries Oxygen in RBCs
  10. 15. A disease caused by blockages in the arteries supplying the heart with blood
  11. 17. The upper chamber of the heart
  12. 21. A blood vessel containing valves
  13. 22. Proteins produced by specific cells in response to an infection
  14. 23. The lower chamber of the heart
  15. 26. The space inside a blood vessel