Across
- 1. diffferent types of tissues working together
- 4. connect muscles to bones
- 7. upper layer ofthe skin
- 10. passage for food
- 12. balance in the body
- 14. basic unit of structure of all living things
- 16. system that gets rid of waste products
- 17. to achive a balanced diet
- 18. connect bones to bones
- 19. a group of similar cells working together
- 20. addictive chemical in smoking products
- 21. a group of organs working together
Down
- 2. takes place in the small intestines
- 3. a product that breaks down foods
- 4. also know as the windpipe
- 5. area where 2 bones meet
- 6. system that includes esophagus and stomach
- 8. oxygen binds to this substance
- 9. a system consisted of heart and vessels
- 11. response when facing stress
- 13. these can be A,B,O or combinations of them
- 15. system that takes in oxygen