Across
- 2. foreign intruders
- 3. engulf and destroy bacteria
- 6. non-antibody-producing lymphocytes that constitute the cell-mediated arm of immunity
- 14. later immune responses
- 15. police the body in blood and nymph
- 17. functions at peak levels only during youth
Down
- 1. cells release this inflammatory chemical when injured
- 4. another name for "humoral immunity"
- 5. mixture of dead or dying neutrophils, broken-down tissue cells, and living and dead pathogens
- 7. originate from hemocytoblasts in red bone marrow
- 8. harmful or disease-causing microorganisms
- 9. receives lymph from the rest of the body
- 10. blood-rich organ; filters blood
- 11. tissue grafts harvested from a different animal species
- 12. resemble tonsils
- 13. collection of lymphocytes
- 16. immunoglobulins or Igs