| A | B | 
|---|
| cytoskeleton | provides a cell with shape, support, and strength. | 
| nuclear pore | openings in the nuclear membrane used for transport | 
| ribosomes | where proteins are made | 
| golgi complex | packages the molecules made in the ER | 
| transport vesicle | transports the substances in a cell | 
| lysosome | digests old organelles | 
| mitochondria | where ATP (cell fuel) is made | 
| nucleus | controls the cell's activities | 
| eukaryote | a cell with a nucleus and membrane-bound organelles | 
| prokaryote | a cell without a nucleus and membrane-bound organelles | 
| organelle | a small structure within a cell that has a specialized function | 
| plasma membrane | surrounds the cell; allows some materials to exit or enter the cell. | 
| nucleolus | where rRNA is synthesized | 
| smooth endoplasmic reticulum | lipid synthesis; detoxification | 
| central vacuole | water and nutrient storage in plant cells | 
| cytosol | jelly-like substance inside a cell | 
| chloroplast | site of photosynthesis | 
| cell wall | in plants, provides the cell with support and protection | 
| plasmodesmata | permanent communication channels in plant cells | 
| gap junction | temporary communication channel between animal cell membranes | 
| cilia | hairlike structures on the cell membrane used for movement or "sweeping" | 
| flagella | tail-like structure used for movement | 
| intermediate filament | holds organelles in place | 
| microfilament | used to form pseudopodia | 
| microtubule | used to form cilia, flagella, and cell "monorails" | 
| nuclear envelope | double membrane surrounding the nucleus | 
| rough endoplasmic reticulum | protein processing center |