Across
- 4. traps pathogens and helps prevent them from entering your cells
- 5. a type of leukocyte which includes T- and B-cells
- 6. lymph nodes and lymph vessels make up this part of the immune system
- 7. a type of WBC that surround, kill and "eat" bacteria
- 10. filters blood to remove pathogens; activates B-cells and removes old Red Blood Cells
- 11. made by B-cells; special proteins that help destroy pathogens
Down
- 1. make antibodies
- 2. another name for White Blood Cell
- 3. B-cells that get reactivated when a pathogen reinfects you
- 8. chemical that increases blood flow to infected area
- 9. kill infected host cells
- 12. being resistant to an infectious pathogen