Across
- 3. chest
- 4. main nutrient used in respiration
- 7. lets you breathe while eating
- 11. diaphragm relaxes, moves up
- 12. large muscle beneath the lungs
- 13. move mucus to the throat to be swallowed
- 14. without oxygen
- 17. tiny air sacs
- 18. smaller branches of bronchi
- 21. stops food from entering trachea
- 23. tube that connects the mouth/nose with lungs
- 25. food is broken down to release energy
- 26. top part of the trachea
- 27. muscles between ribs
Down
- 1. breathe out
- 2. produced by anaerobic respiration
- 5. wrapped around the alveoli
- 6. gas is able to pass through it
- 8. in the presence of oxygen
- 9. make sounds when air passes over them
- 10. breathe in
- 15. moistens air, traps pathogens
- 16. traches divides into two of them
- 19. gas organisms need
- 20. diaphragm contracts, moves down
- 22. gases entering and leaving an organism
- 24. gas that must be removed