Across
- 3. made up of only one cell
- 5. cells that don't have a nucleus
- 10. similar cells grouped together form
- 11. this system sends and receives messages from the brain
- 12. the process that results in a species no longer existing
- 14. arrangement of things in the order that they occurred
- 16. this system allows you to breath in oxygen and out carbon dioxide
- 18. multiple tissues grouped together form
- 19. this system removes liquid waste
- 21. multiple organs grouped together form organ
- 22. describes the variety of different species of organisms
Down
- 1. cells that do have a nucleus and are more complex
- 2. structures in cells that carry out specific functions
- 4. preserved remains of organisms, or imprints, that show what long-dead organisms looked like and how they lived
- 6. this system moves blood throughout the body
- 7. this system breaks down food and provides nutrients to the body
- 8. this system provides supports and helps protect your body
- 9. this system helps to move your body
- 13. made up of more than one cell
- 15. any living thing
- 17. fossils are found in this layer of rock
- 20. basic building blocks of life