Across
- 5. We need oxygen so that our cells can convert glucose into __ for energy.
- 8. This type of respiration happens in the body tissues.
- 10. This is the iron-containing protein that carries oxygen to our body tissues.
- 13. This is when a substance moves from high to low concentration.
- 14. These are the air sacs in the lungs.
- 15. This is the hollow area behind the nose. (no space)
Down
- 1. This is the windpipe.
- 2. This is the throat area. It is split into esophagus and trachea.
- 3. This is the flap that covers the trachea when eating.
- 4. These are the smaller branches inside each lung.
- 6. These are the two branches that lead into each lung.
- 7. This type of respiration happens in the alveoli of the lungs.
- 9. This is a muscle that works to allow inspiration and expiration.
- 11. This is the voice box.
- 12. Another word for breathing is __ ventilation.
- 15. This structure is full of hair and mucus to trap microbes and dust.