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Cells 2
Organization/Movement across a cell
| Term | Definition |
|---|---|
| tissue | group of similar cells that work together to perform a specific fuction |
| organ | made up of different kinds of tissues that function together |
| organ system | group of organs that work together to perform a major function |
| organism | all organ systems together |
| selectively permeable | membrane that selects what can move in and out of the cell |
| passive transport | movement of materials across a cell membrane |
| osmosis | movement of water across a selectively permeable membrane |
| diffusion | molecules moving from an area of high concentration to an area of lower concentration, without energy |
| active transport | molecules moving from an area of low concentration to an area of higher concentration; requires energy |
| cell | basic unit of structure and function |