| A | B |
|---|
| Plasma Membrane | The boundary of the cell. Holds the cell together and controls entry and exit of substances. It has many receptors on it, allowing it to determine what substances are transported into the cell and what substances are allowed out of the cell. |
| Nucleolus | Wrapped in a nuclear membrane called the nuclear envelope. |
| Nuclear Envelope | The nuclear membrane that wraps the nucleus. |
| Ribosome | The tiny kitchens within the cell. Proteins are synthesized here. |
| Intermediate Filament | Responsible for strengthening and supporting the cells. |
| Lysosome | A kind of vesicle. It's main function is to break down lipids, proteins, polysaccharides, carbohydrates, and nucleic acids. |
| Smooth Endoplasmic Reticulum | A series of tubes that are used in intracellular transport as well as in the reproduction of lipids and carbohydrates. |
| Microtubule | Spiral strands of proteins that form a rope-like structure. |
| Centrioles | Found in the Centrosome. |
| Cilia | Tiny hairs fromed from an intricate arrangement of microtubules. |
| Microfilmanets | Enable certain cells to contract. |
| Mitochondria | The major site of ATP synthesis in the cell. |
| Golgi Apparatus | The cell's packaging plants. They take varius chemicals and package them for many purposes, especially secretion. |
| Secretory Vesicle | A tiny membrane-bound sac. It pinches off the Golgi apparatus and travels through the cytoplasm to the plasma membrane, where it's contents can be released outside the cell. |
