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