Across
- 2. a thin skeletal muscle that sits in the chest
- 3. An passage way for air
- 5. a long stick like figure
- 9. smallest and most numerous of vessels
- 10. what you use to smell
- 11. we need it to breath
Down
- 1. air passages inside the lungs that branch alveoli the lungs and the blood mix oxygen and carbon
- 4. An air-filled organ
- 6. a chemical compound
- 7. the net moving of anything
- 8. we have 24 of them