Body system project- Immune system

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Across
  1. 4. an antibody that counteracts a toxin
  2. 5. small organ behind breast bone
  3. 7. type of biological therapy
  4. 12. immune to a specific disease after contracting it
  5. 13. fine branching blood vessels
  6. 15. antigen-presenting cells
  7. 16. the system that protects against disease
  8. 17. injecting virus on purpose to product antibodies
  9. 19. a white blood cell with a single round nucleus
Down
  1. 1. nodes located in chest
  2. 2. thin walled tubes that carry lymph
  3. 3. phagocytic cell found in stationary form in tissues
  4. 6. largest type of leukocyte
  5. 8. largest organ in lymphatic system
  6. 9. a colorless fluid that contains white blood cells
  7. 10. immunoglobin is an example
  8. 11. willingness to tolerate something
  9. 13. system also known as complement cascade
  10. 14. disease- mistakenly attacks own body
  11. 18. immunity that is produced