Across
- 3. How cells interact with other cells
- 5. Body over-reacts to internal threat
- 7. They eat and then digest the invaders
- 8. Body over-reacts to external threat
Down
- 1. Name of process where antigens are presented to immune cells
- 2. Protects your respiratory system and is a mucus membrane
- 4. Body under-reacts to external threat
- 6. Body under-reacts to internal threat