| A | B |
| Cellular Respiration | The process in which oxygen is used to break down sugar and food |
| Cytoplasm | The material that fills much of the inside of cells. |
| Cell membrane | The structure that separates the cell from its external environment. |
| Nucleus | Small structure in the cell that contains the majority of the genetic information of the cell and directs the cells activities. |
| Organelle | Cell structure, often surrounded by a separate membrane, that performs a specific function. |
| Protist | An organism made up of a single cell or many cells with a nucleus, and that is not an animal, plant, or fungus. |
| Bacteria | A single-celled organism that does not have a nucleus or other membrane-bound organelles. |
| Virus | A microbe that is not made of cells and cannot grow or reproduce outside of a living cell. |
| Mitochondria | The organelles known as the "power houses of the cell" where the stored energy of food is made available for use within the cell |
| Cell Wall | In plant and bacterial cells, the outermost non-living cellulose layer that surrounds the entire cell, including the cell membrane. |
| Chloroplast | The chlorophyll- ontaining organelles found in the cytoplasm of plant and algae cells |
| Cilia | Hairlike structures found on the outside of certain cells. Certain protozoans use these to propel themselves through the water in which they live. |
| Deoxyribonucleic Acid (DNA) | A double-stranded molecule located INSIDE the nucleus. It contains genetic information. |
| Endoplasmic Reticulum | The intricate system of tubes leading from the nuclear membrane into the cytoplasm that is involved in transporting proteins. |
| Golgi Apparatus | A subcellular organelle involved in packaging proteins for export from the cell. |
| Nuclear Membrane | A layer inside the cell that surrounds the nucleus and contains many tiny pores. |