Biology

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