Across
- 3. descends from behind the ear at the mastoid process, divides and inserts into clavicle and sternum
- 7. a layer of tightly cells with no intercellular material
- 10. superior part of sternum
- 15. aid in both expiration and inspiration depending on their location
- 17. the only muscle you NEED to breathe
- 19. topmost cervical vertebrae that supports the skull
- 21. type of tissue that secretes surfactant in lungs
- 22. a cut into superior/inferior portions
Down
- 1. where gas exchange occurs
- 2. muscle fiber connecting bone to bone
- 4. a group of muscles that do opposite things
- 5. heart cavity
- 6. lining that allows for smooth contact between lungs and ribs
- 8. exchange of gas between an organism and the environment
- 9. when contracted, serves as a wall to keep abdominal viscera from pushing out posteriorly
- 11. tiny sacs deep within lungs
- 12. provides support for lower extremities
- 13. mucous solution between pariental and visceral linings
- 14. saw-like
- 16. type of vertebrae that provides direct attachment for abdominal and back muscles
- 18. cavity behind nasal and oral openings
- 20. long collapsed tube posterior and adjacent to trachea