Across
- 3. and exchanges
- 4. system;skin, hair, nals
- 7. the heart
- 8. pathogens
- 9. blood cells;carries oxygen
- 11. swelling, and heat
- 15. scabs
- 18. bacteria
- 19. gland;cools body
Down
- 1. or dead strands
- 2. layer
- 5. viruses
- 6. from the heart
- 10. glands;moistens skin and hair
- 12. blood cells;fights infection
- 13. causing agent
- 14. destroys pathogens
- 16. layer
- 17. for the fighters