Across
- 3. Also known as the windpipe
- 5. An organ protected by the ribs
- 7. Muscles found in between the ribs
- 9. Bones that protect our lungs and heart
Down
- 1. You breathe in through this organ
- 2. This muscle is found below the lungs, it moves up and down when we breathe
- 4. A pair of organs that help us to breathe
- 6. Small tubes found in the respiratory system
- 8. The place in the lungs where gas exchange takes place