Across
- 3. fluid filled space that reduces friction
- 4. protects thoracic organs
- 11. front of the chest that contains connective tissue and part of the thymus
- 13. protects the heart and anchors ribs
- 15. produces t-cells for the immune system
- 16. divides the upper and middle lobes of the right lung
- 18. membrane lining the chest wall
Down
- 1. carries deoxygenated blood from the heart to the lungs
- 2. moves the ribs to assist with breathing
- 5. organ responsible for gas exchange with 2 lobes
- 6. pumps blood throughout the body
- 7. surrounds and protects the heart
- 8. transports food from the throat to the stomach
- 9. main airway that carries air to and from the lungs
- 10. carries air from the trachea to the left lung
- 12. organ responsible for gas exchange with 3 lobes
- 14. membrane covering the surface of the lungs
- 17. primary muscle that promotes inhalation
- 19. cluster of tiny air sacs where gas echange occurs
- 20. top portion of the lung