Across
- 6. A special protein that helps fight infection
- 8. Body's resistance to disease-carrying agents
- 10. A thick secretion
- 11. cell Cells that destroy pathogens
- 13. system This system provides body cells with oxygen
- 16. Structure on the left side of your abdomen that filters foreign matter from the blood and nymph
- 18. Microscopic air sacs
Down
- 1. The throat
- 2. Two tubes through which air moves to the lungs
- 3. Small tubes that go to the alveoli
- 4. a flap that covers the entrance to the throat
- 5. gland Structure that causes white blood cells to become t cells
- 7. cell Cells that produce antibodies
- 9. membrane A type of tissue that lines body cavities
- 12. The tube that moves air
- 14. system This protects the body from pathogens
- 15. Hair-like structures that remove dust and other particles from the air
- 17. node Structure that filters and destroys pathogens
- 19. Main organ of the respiratory system