Across
- 3. The muscle that makes your breath go in and out
- 6. Tiny airways branching off like twigs
- 7. The waste gas your body gets rid of
- 8. A tube with rings that goes down
- 10. The first stop for incoming air
- 11. Microscopic highways for gas exchange
Down
- 1. What your body is really after in every breath
- 2. A gentle spreading from high to low concentration
- 4. These expand when you inhale deeply
- 5. Small air sacs where gas exchange happens
- 6. A way in the airway road
- 9. Bones that wrap around your chest