Across
- 2. the windpipe
- 4. one way that oxygen is taken in and CO2 released
- 7. small spheres in the lungs which are referred to as "air sacks"
- 8. the voice box between the throat and windpipe
- 9. the throat
- 12. the vein which carries oxygen poor blood to the lungs
- 16. the largest blood vessel
- 19. things in the digestive system that prevent food from moving forward. These things contract when food cannot go forward.
- 20. the part of the heart that pushes oxygen rich blood to the rest of the body
- 21. increases surface area in the rest of the small intestine
- 22. a chemical that is injected into "chemical city"
- 23. a flap in the throat that makes food do into the stomach and air into the lungs
Down
- 1. the vein which carries oxygen poor blood to the heart
- 3. a valve between the right atrium and the right ventricle
- 5. something that breaks down protein in the stomach
- 6. the small "roads" in the lungs were oxygen and CO2 travel
- 10. the first enzyme to break down carbohydrates
- 11. an accessory organ
- 13. the part of the heart that pushes oxygen poor blood to the lungs
- 14. a valve between the left atrium and the left ventricle
- 15. another name for large intestine
- 17. diffusion of water
- 18. The place were chemicals are injected into the small intestine