Across
- 3. Single air sac in the lung
- 6. Diagonal lung separation
- 7. Final part of the bronchial tree before alveoli
- 10. Protective structure around the chest cavity
- 11. Space between lung membranes
- 15. Windpipe that carries air to the lungs
- 16. Muscle between ribs aiding breathing
- 17. Tube that carries food from mouth to stomach
- 18. Lower portion of the lung
- 19. Muscle that helps with breathing
Down
- 1. Lung on the right side of the body
- 2. Tiny air sacs where gas exchange occurs
- 4. Lung on the left side of the body
- 5. Small openings that connect alveoli
- 8. Membrane directly covering the lungs
- 9. Cluster of alveoli for gas exchange
- 12. Organ involved in immune system development
- 13. Muscle that pumps blood throughout the body
- 14. Bone in the center of the chest
- 20. Major artery carrying blood to the lungs