| A | B |
|---|
| cells | all living things are made up of these |
| osmosis | type of diffusion in which water passes through the cell membrane |
| cilia | hair-like structures that guide food particles into a paramecium's oral groove |
| flagellum | a whip-like structure that helps single-celled organisms (like euglena) move by spinning like a propeller |
| chloroplast | pigments in plants that absorb sunlight and use energy to make food and give plants their color |
| organelles | smaller structures inside cells that have specific functions |
| nucleus | directs the activities of the cell and stores DNA |
| cell membrane | thin, flexible covering that surrounds all types of cells; allows food, water, and gases to enter the cell and wastes to leave |
| cell wall | found only in plant cells; a rigid outer layer that surrounds the cell membrane and protects the cell |
| cytoplasm | a thick, jelly-like substance betweem the nucleus and cell membrane in which the cell's organisms are suspended |
| ribosomes | assemble proteins; are not surrounded by a membrane |
| lysosomes | help the cell break down nutrients and old cell parts |
| vacuoles | fluid-filled sacs that store water, food, waste, and other substances; plant cells have one large one, and animal cells have several smaller ones |
| Golgi apparatus | receives proteins, and then "ships" them outside the cell |
| mitochondria | the "power plants" of the cell; process releases carbon dioxide, water, and energy |
| endoplasmic reticulum | two types: rough (secretes proteins) and smooth (breaks down toxic substances & controls chemical levels) |
| cilia | small hair-like structures that sweep food particles into the oral groove of a paramecium |
| diffusion | the movement of particles from an area of high concentration to an area of low concentration |
