biology
Across
- 3. one of two openings where you breath from
- 5. filters urea
- 8. tube tubes at the bottom of your windpipe that connect to each lung
- 14. tiny air sacs in the lung where the exchange of oxygen and carbon dioxide take place
- 15. of cartilage the trachea has these rings that serve as protection
- 16. thin sacs that surround each lung
- 17. one of two openings where you breath from
- 18. pumps blood
- 19. holds food
- 20. hold air
Down
- 1. small tubes of the bronchial that lead to the alveoli
- 2. takes blood away from heart
- 4. bladder stores urine until ready to excrete
- 6. increases the surface
- 7. tissue flaps at the entrence trachea that closes when you swallow
- 9. bones that protect your lungs
- 10. hallow organs that allows you too talk
- 11. pushes food down
- 12. muscle that helps your lungs pull in and push out air
- 13. absorbs water