Across
- 1. ____ blood cell, fights infection
- 3. ___ system, sends messages around the body
- 4. Blood vessels that take blood to every cell in the body
- 7. ____ system, breaks down food
- 10. Groups of tissues working together
- 11. Tube that airs passes through
- 12. Organ that makes lots of enzymes
- 14. Liquid portion of the blood
- 17. Chambers at the bottom of the heart
- 20. Large ____ intestine, where water is absorbed
- 21. Chambers at the top of the heart
- 22. Organ where acid is made
Down
- 2. Chemicals that break down food
- 5. Blood vessels that take blood away from the heart
- 6. ___ blood cell, carries oxygen
- 8. Smallest living thing
- 9. Tube that food passes through
- 11. Groups of cells working together
- 12. Part of the blood responsible for clotting
- 13. Organ ____, groups of organs working together
- 15. Where bile is made
- 16. Movement of substances from high to low concentration
- 17. Blood vessels that take blood towards the heart
- 18. Organs needed to breathe
- 19. ____ intestine, where the majority of digestion takes place