Across
- 2. The process of breathing air in so it contacts exchange surfaces within the lungs
- 3. What gas exchange structures sit at the ends of bronchioles?
- 5. When we breathe in, the volume of the thorax...
- 10. The respiratory system is adapted for efficient...
- 11. What vessels cover alveoli in a network to facilitate gas exchange?
- 13. What exists in rings within the trachea to help keep it open?
- 14. Breathing is a passive process resulting from changes in...
- 15. What kind of membranes seal the lungs by wrapping around them and lining the ribcage?
- 16. What kind of muscles move the ribs?
Down
- 1. The gas we transfer from the blood to the air
- 4. What muscle sits below the lungs to help breathing?
- 6. The gas we absorb into the blood from the air
- 7. What does the trachea branch into inside the lungs?
- 8. How many pairs of ribs protect the lungs?
- 9. When we breathe out, the diaphragm...
- 12. Alveoli are adapted for gas exchange since they have a large...