Unit 7 Respiratory System
Across
- 1. air sacs in the lungs
- 4. to inhale and exhale
- 5. gas in the environment necessary to our survival
- 7. caused by damaged alveoli
Down
- 1. respiratory illness causing coughing and wheezing
- 2. main organs in the respiratory system
- 3. air passes through these into the lungs
- 6. to breathe in
- 7. to breathe out