Human Body
Across
- 2. chemical abbreviation for the energy molecule made during CR
- 4. where most mechanical digestion occurs
- 6. the nervous, skeletal and muscular systems work together to help us ____
- 9. gaseous waste product of CR
- 10. where most chemical digestion occurs
- 11. what the circulatory system uses to transport materials
- 12. most important product of CR
- 14. skeletal muscles work in ____
- 16. organ that holds urine
- 18. what the digestive system provides for cell respiration
- 19. muscles move in response to signals from the _____
- 21. type of muscle found in internal organs
- 23. product of the endocrine system
Down
- 1. connects the brain to the rest of the nerves
- 3. raw materials of CR
- 5. special type of muscle found only in the heart
- 7. the circulatory system ____ all the materials for cell respiration
- 8. muscles pull on ____
- 13. connect arteries and veins
- 15. small sacs in the lungs where gas exchange occurs
- 17. the ____ system collects and removes the waste products of CR
- 20. carry blood away from the heart
- 22. what the respiratory system provides for cell respiration