Across
- 2. Forms by white blood cells fighting and dying
- 3. A first line defence
- 4. A type of chemical barrier
- 6. A quick and powerful response to a localised infection
- 7. A second line of defence
Down
- 1. A second line of defense
- 2. A type of white blood cell
- 5. A physical barrier that pathogens cannot cross
- 6. A type of chemical barrier