Across
- 4. muscles between the ribs
- 5. outside layer of the pleura
- 8. Smallest conducting airway
- 10. air sacs in the lungs
- 14. moves food and water from throat to stomach
- 15. air way down to lungs
- 16. between thorax and abdomen
- 18. inside layer of the pleura
- 19. connects all ribs
- 20. develops helper T-cells
Down
- 1. in front of the heart, held in place by the sternum
- 2. carries blood from heart to lungs
- 3. space between the pleurae
- 6. Narrowest airway of the lungs
- 7. groove in the right lung
- 9. forms boundaries of thoracic cavity
- 11. collection of alveoli
- 12. organ that beats blood around the body
- 13. connects respiratory bronchioles to alveolar sacs
- 17. top portion of the lung