Across
- 2. cup-like structure
- 6. hollow, muscular sac
- 8. collection of air sacs
- 9. air enters the body via the nostrils
- 10. high pitched whisitling sounds
- 12. listening to sounds within body
- 14. muscular partition
- 16. area between lungs
- 19. flap of cartilage
- 20. K+
Down
- 1. UA
- 3. 2 bean-shaped organs
- 4. triangular region
- 5. vertical tube
- 7. double-layered membrane
- 11. HD
- 13. 2 muscular tubes
- 15. after passing the nasal cavity
- 17. Na+
- 18. tube that carries urine