Across
- 4. The biological study of immune systems
- 5. Another name for white blood cell
- 6. ___ Immunity. First Line of Defence
- 8. A substance produced by lymphocytes in response to foreign cells
- 11. Examples like the Skin, Mucous membrane
- 12. Foreign substances that enter your body, and make you sick
Down
- 1. ___ Immunity. Acquired and slowly developed overtime
- 2. Type of white blood cell that produces antibodies
- 3. Development of disease
- 7. Type of white blood cell that ingest invader cells
- 9. Foreign substances introduced to the body
- 10. The process of foreign substances attacking your body