Across
- 1. disease that can be known with a butterfly rash
- 2. a component that makes up the central lymphoid tissue
- 4. largest organ in the lymphatic system
- 5. something foreign in the body
- 6. type of cell that engulfs and absorbs bacteria and other small cells
- 9. color cells that seek out and destroy harmful organisms
- 12. protects body from abnormal organisms
- 15. another word for antibodies
- 16. any substance capable of causing an allergic reaction
- 18. infection usually caused by the Epstein-Barr virus
Down
- 1. the bodies secondary circulation system
- 3. vessels that bring the lymph into the node
- 4. known as primitive cells
- 7. main organ of the lymphatic system
- 8. swelling that occurs in arms and/or legs
- 10. attack invaders outside the cells
- 11. gene that can transform a healthy cell into a tumor cell
- 13. attack invaders inside the cells
- 14. final stage of HIV infection (not everyone advances to this stage)
- 17. organ essential for storing special cells and trapping cancer cells