Review Circulatory and Immune system

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Across
  1. 1. What organ filters pathogens and old blood cells?
  2. 7. What type of T-cell helps activate other immune cells?
  3. 8. What type of T-cell destroys infected cells?
  4. 11. What is the system of vessels that transports lymph?
  5. 12. What type of leukocyte directly kills infected cells?
  6. 14. What chamber of the heart receives deoxygenated blood?
  7. 15. What valve prevents backflow into the left ventricle?
  8. 19. What organ is responsible for T-cell maturation?
  9. 20. What vessels bring blood back to the heart?
  10. 21. What are the smallest blood vessels?
  11. 24. What is the fluid that circulates in the lymphatic system?
  12. 26. What is another name for the circulatory system?
  13. 27. What is the primary organ that produces leukocytes?
  14. 28. What fluid circulates throughout the body?
  15. 29. Where are pathogens trapped and antibodies created?
  16. 30. What valve separates the right atrium from the right ventricle?
Down
  1. 2. What type of blood cell fights infections?
  2. 3. What type of blood cell carries oxygen?
  3. 4. What type of cell attacks parasites?
  4. 5. What chamber of the heart pumps oxygenated blood?
  5. 6. What type of leukocyte produces antibodies?
  6. 9. What blood component helps with clotting?
  7. 10. What type of leukocyte presents antigens?
  8. 13. What vessels transport blood away from the heart?
  9. 16. What is the liquid portion of blood called?
  10. 17. What valve controls blood flow between the left atrium and ventricle?
  11. 18. What is the main organ of the circulatory system?
  12. 22. What is a disease-causing microorganism called?
  13. 23. What type of cell is responsible for fighting infections?
  14. 25. What type of leukocyte engulfs bacteria?
  15. 27. What type of cell is responsible for allergic reactions?