Across
- 1. Coughing and sneezing keep your lungs ____
- 4. Breathing allows you to take in the oxygen your _____
- 6. You lose a lot of water just by __________
- 8. Your ____ is a filter, heater, and a humidifier
Down
- 2. Children who breathe directly from the mouth will likely develop a ___
- 3. Lungs are not ____ free
- 5. ____ is the only organ that can float on water
- 7. Some ___ never leaves your lungs