Across
- 1. person's airways become inflamed
- 4. the action of breathing
- 5. a colorless, odorless reactive gas
- 7. hair-like projections that move microbes
- 8. exhalation of breath
- 9. the long curved bones
Down
- 1. part of the body between the thorax (chest) and pelvis
- 2. is a muscular tube connecting the throat (pharynx) with the stomach
- 3. the hollow muscular organ forming an air passage to the lungs
- 6. are a pair of spongy, air-filled organs