| Term | Definition |
| Nucleus | Produces and contains genetic material, which is instructions the cell uses to make proteins (including enzymes) |
| Flagellum | Long extension fro the cell which allows the cell to swim |
| Nucleolus | Produces ribosomes in eukaryotic cells |
| Rough Endoplasmic Reticulum | Produces proteins for secretion or for embedding in the cell membrane |
| Mitochondrion | Provides energy for cell's metabolism by performing cellular respiration |
| Smooth ER | Produces fats, oils, and steroids |
| Centrioles | Two structures which produce the mitotic spindle, cilia, and flagella – only found in animal cells |
| Centrosome | A region where the mitotic spindle is formed – in animal cells, it contains the centrioles; in plant cells, centrioles are not seen |
| Golgi Apparatus | Modifies or packages molecules from the ER |
| Nuclear Pore | Allows the transport of materials through the nuclear membrane |
| Nuclear Envelope | The barrier between the nucleus and the cytoplasm |
| Cell Membrane | Controls what goes into and out of the cell, separates inside from outside |
| Ribosome | Assembly of proteins |
| Cytoskeleton | The network of fibers which maintains the cell's shape, moves molecules and organelles around the cell, and helps the cell move |
| Microtubule | Fibers of the cytoskeleton which maintain the cell's shape, and form the mitotic spindle |
| Cytosol | The fluid of the cytoplasm |
| Lysosome | Breaks down nutrients, invasive organisms, or damaged organelles in the cell |
| Chromatin / DNA | The genetic material of all prokaryotic and eukaryotic cells |