Across
- 1. Separates right lung's superior and middle lobes
- 3. Conducts air to lungs; located in neck and upper chest
- 7. Immune organ behind sternum; active in childhood
- 10. Membrane directly covering lungs; allows frictionless movement
- 12. Outer pleural membrane lining chest wall; reduces lung friction
- 14. Topmost portion of lung; extends above first rib
- 15. Main breathing muscle; separates thoracic and abdominal cavities
- 16. Lower lobe of left lung; involved in gas exchange
- 17. Space between pleural membranes; contains lubricating fluid
- 19. Central lobe of right lung; participates in respiration
- 20. Divides superior and inferior lobes of left lung
Down
- 2. Separates middle and inferior lobes of right lung
- 4. Flat chest bone protecting heart; anchor for ribs
- 5. Upper lobe of right lung; aids in gas exchange
- 6. Double membrane around heart; reduces friction and protects heart
- 8. Pumps blood throughout the body; located in mediastinum
- 9. Three-lobed lung located in right thoracic cavity
- 11. Bottom portion of lung resting on diaphragm
- 13. Upper lobe of left lung; responsible for respiration
- 18. Two-lobed lung located in left thoracic cavity