| A | B |
|---|
| membrane | thin coverings that form the outer boundary of a cell |
| passive transport | the movement of substances across a membrane that does NOT require energy |
| diffusion | movement of substances from an area of high concentration to an area of low concentration |
| osmosis | diffusion of water through a membrane |
| active transport | movement of substances across a membrane that DOES require energy |
| cell wall | the outer boundary of a plant cell |
| cytoplasm | inside of a cell |
| mitochondria | cell powerhouse |
| endoplasmic reticulum | cell delivery system |
| ribosomes | assemble proteins |
| Golgi bodies | collect chemicals from the cytoplasm |
| vacuoles | serve as cell's containers |
| lysosomes | digest food in the cell |
| chloroplasts | capture energy from sunlight |
| flagellum | a whip-like projection |
| cilia | hair-like structures surrounding the cell |
