Across
- 2. your________ goes up and down when you breathe
- 4. what do you breathe out?
- 7. smaller airways in the lungs
- 8. tube that connects to your lungs
- 10. where you breathe in from
- 11. tiny blood vessels where gas exchange happens
Down
- 1. process where oxygen and carbon dioxide exchange through cell membranes
- 3. main organs for breathing
- 5. what do you breathe in?
- 6. where the carbon dioxide and oxygen exchange
- 7. asthma mostly effects the ________
- 9. the set of bones protecting your lungs