Across
- 3. tiny air sacs
- 4. the powerhouse of the cell
- 9. They lead to alveoli
- 11. net movement of particles down a concentration gradient minerals elements on earth and in food
- 13. it forms clots to stop and stops bleeding
- 14. the windpipe
- 15. A substance in our lungs that traps dirt
Down
- 1. Transport blood
- 2. The organ that connects to the trachea
- 5. a chemical produced after exercise
- 6. sweet tasting substance usually in food
- 7. cell with biconcave shape
- 8. process of breathing
- 10. This element is found on earth and in food
- 12. 55% is in our blood