Across
- 2. tiny balloon like air sacs in the lungs
- 5. nerve cell
- 6. pumps blood throughout the body
- 7. causes the lungs to expand and contract
- 8. removes waste
- 13. directs sugar to cells
- 16. a group that makes up the endocrine system
- 18. muscles you have no control over
- 19. detects information from the environment and controls body functions
- 20. transports materials to and from cells
- 22. supports and protects the body
- 25. the maintenance of stable internal conditions in an organism
- 26. muscles you can control
Down
- 1. protects bones when they rub against each other
- 3. controls many processes by releasing chemicals
- 4. master gland
- 9. takes in oxygen and eliminates carbon dioxide
- 10. enable movement of the body and internal organs
- 11. creates blood cells
- 12. breaks down food and absorbs nutrients
- 14. controls metabolism
- 15. organs in the skeletal system
- 17. a place where two bones come together
- 21. carries blood to the heart
- 23. raises/lowers sugar levels in the blood
- 24. chemical messengers secreted by glands