Across
- 3. carbon dioxide and oxygen swap spots from the capillaries into the aveoli
- 5. breathing in oxygen
- 8. small air sacs at the end of each bronchiole
- 9. tubes that lead to the left and right lung
- 10. narrow airways that branch out from the bronchi
Down
- 1. diaphragm relaxes against the lungs and carbon dioxide exits through the mouth or nose
- 2. tube lined with ring-shaped pieces of cartilage
- 4. tiny blood vessels that wrap the alveoli
- 6. muscle below the lungs that separates the chest and abdomen and helps you breathe
- 7. very small hairs inside that collect dust or unwanted particles that come in with the air