Across
- 2. it is in the red blood cells, denoted as (Hb)
- 5. contracts to increase volume of thorax
- 7. breathing out
- 8. the passageway where air comes in
- 9. small air sacs
Down
- 1. leads FROM larynx TO bronchus
- 3. air travels through it to the lungs
- 4. a passageway connecting the nose to the larynx
- 5. a sickness
- 6. where gas exchange occurs
- 7. fun and makes your body strong and healthy