| A | B |
|---|
| Organelle | A tiny cell structure that carries out a specific function within the cell. |
| Cell Wall | A rigid layer of nonliving material that surrounds the cells of plants and some other organisms. |
| Cell Membrane | The outside boundary of a cell; controls which substances can enter or leave the cell. |
| Nucleus | The control center of a cell that directs the cell’s activities; contains the chemical instructions that direct all the cell’s activities and determine the cell’s characteristics. |
| Chromatin | Material in cells that contains DNA and carries genetic information. |
| Cytoplasm | The region of a cell located inside the cell membrane (in prokaryotes) or between the cell membrane and nucleus (in eukaryotes); contains a gel-like material and cell organelles. |
| Mitochondria | Rod-shaped cell structures that produce most of the energy needed to carry out the cell’s functions. |
| Endoplasmic Reticulum | A cell structure that forms a maze of passageways in which proteins and other materials are carried from one part of the cell to another. |
| Ribosome | A tiny structure in the cytoplasm of a cell where proteins are made. |
| Golgi Body | A structure in a cell that receives proteins and other newly formed materials from the endoplasmic reticulum, packages them, and distributes them to other parts of the cell. |
| Chloroplast | A structure in the cells of plants and some other organisms that captures energy from sunlight and uses it to produce food. |
| Vacuole | A water-filled sac inside a cell that acts as a storage area. |
| Lysosome | A small round cell structure that contains chemicals that break down large food particles into smaller ones. |
| Prokaryote | An organism whose cells lack a nucleus and some other cell structures. |
| Eukaryote | An organism with cells that contain nuclei and other cell structures. |
