Across
- 1. series of slender curved bones articulated in pairs to the spine, protecting the thoracic cavity
- 4. transports air to and from lungs
- 5. common passageway for air, food and liquid
- 6. air sacs of gas exchange
- 8. Membrane cover the lungs and line the chest cavity
- 10. which an organism absorbs from the environment gases necessary for its cellular metabolism
- 13. Cavity flitters, warms and moistens air
- 14. branching airways
- 16. passage for food and air
Down
- 2. Muscle moves ribs during respiration
- 3. respiration the chemical reaction in which organic molecules are degraded to make ATP molecules
- 7. maintains an open airway, routed food and air appropriately
- 9. skeletal muscle of respiration
- 11. covers larynx during swallowing
- 12. transport air to alveoli for gas exchange
- 15. passage for airway