Across
- 2. membrane-bound sacs that are filled with fluid; store water, food, waste, and other substances
- 8. a single-celled organism that is housed inside a shell
- 9. "brain" of the cell; storehouse of a cell's important information; core of a cell
- 10. whip-like "propeller" tail that helps a single-celled organism move
- 11. a group of related tissues that work together to perform the same function
- 13. system of membranes that receive proteins and "ship" them out to other parts of the cell
- 14. The parts of a cell
- 15. rigid, outer layer of the cell; found only in plant cells
- 16. type of diffusion where water passes through a cell membrane
- 17. organelle found only in plants; contain green pigments that absorb sunlight and convert the energy into food
- 20. a large group of similar, specialized cells that work together
- 21. small, ball-shaped organelle that breaks down nutrients and old cell organelles; rare in plant cells
Down
- 1. thin, flexible covering that surrounds all types of cells
- 3. thick fluid located between the cell membrane and the nucleus of a cell
- 4. movement of particles from an area of higher concentration to an area of lower concentration
- 5. tiny hair-like structures on the cell membrane of a single-celled organism; allows organism to move and collect food
- 6. large, peanut-shaped organelles known as the "power plants" of the cell
- 7. reticulum system of membranes and tubes that twist and turn throughout a cell to make paths for materials to pass
- 12. a group of related organs that work together to perform the same function
- 18. organelle that assembles proteins into compounds; not surrounded by a membrane
- 19. basic unit that makes up living things