Across
- 2. the process of breaking down food
- 5. a sac in the lungs where the exchange of oxygen and carbon dioxide place
- 7. carries a signal from one nerve cell to another
- 9. the body central frame work
- 11. when an organism creates offspring
- 12. A large protein which speeds up chemical reactions
- 13. a living thing
- 14. a detachable change in the internal or external environment.
- 16. the smallest organ in the human body
- 19. the largest organ in the human body
- 20. a group of two or more organs that work together to perform a function
Down
- 1. Is made up cells that work together to perform a specific function
- 3. the narrow, winding, upper part of the intestine where digestion is completed and nutrients are absorbed by the blood
- 4. a hormone produced in the pancreases that regulates the amount of glucose in the blood.
- 6. you use this system to breath.
- 8. a reaction to stimulus
- 10. the ability of an organism or cell to maintain internal equilibrium
- 15. organs whose function is to remove carbon dioxide from the blood and provide it with oxygen
- 17. a nerve cell
- 18. is made up of tissues to perform a specific function