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Across 6. where photosynthesis takes place in the plant cell 7. controls cells activities of the cell 8. gel like substance that surrounds and cushions organelles 11. 3rd level of organization; made of many tissues that perform a specific job ex: heart 13. 4th level of organization; many organs working together to do a specific job 14. gate keeper; allows materials to enter and leave the cell 15. 1st level of organization; least complex; single unit 17. 5th level of organization; most complex; made of many organ systems 19. storage for the cell; water, waste, nutrients 20. This cell has a round, circular shape to fit through blood vessels to get oxygen and remove carbon dioxide 21. make proteins for the cell

Down 1. transports materials throughout the cell 2. 2nd level of organization; many groups of similar cells that do a specific job 3. break down waste for the cell 4. powerhouse of the cell; makes energy (ATP) for life processes 5. packages materials to be transported outside of the cell 9. This cell has chloroplasts because its job is to make food for the plant 10. This cell has long, thin structures that can overlap to be able to get shorter or thicker 12. found only in plant cells, gives structure and support 16. This cell has long branching parts to be able to send messages throughout the body 18. This cell doesn't have chloroplasts because it is underground and doesn't need light to get water