| A | B |
| Leeuwenhoek | Invented the first microscope. |
| Hooke | Observed a piece of cork and named the tiny chambers cells because that reminded him of small rooms called cells in a monastery. |
| Schleiden | Stated that all plants are made up of cells. |
| Virchow | Stated that all cells arise from the division of other cells. |
| Brown | Saw the dark structure in the center of each cell. (AKA nucleus) |
| Schwann | Stated that all animals are made up of cells. |
| Dujardin | Stated that many microorganisms are made up of one cell. |
| Cell theory 1st states: | All living things are made up of cells |
| Cell theory 2nd states: | Cells are the basic units of structure and function in living things. |
| Cell theory 3rd states: | All cells come from preexisting cells. |
| Cell membrane | AKA plasma membrane, found in both plants and animal cells. Controls what can enter and leave the cell. They are semi-permeable. |
| Selectively permeable | AKA semi-permeable- Allows only certain things to pass through. |
| Mitochondria | AKA Power house(power plant, generator)- Produces energy by cellular respiration.(food changed into energy). |
| Golgi Apperatus | AKA Packaging plant- Packs protein for distribution. |
| Cell Wall | Gives support and shape to cell. |
| Chloroplasts | Manufacture food in the cell by photosynthesis. |
| Chromosomes | Contain the code that controls the cell and they transmit heredity characteristics. |
| Cytoplasm | Jellylike material where chemical reactions take place within the cell. |
| Endoplasmic Reticulum | Synthesizes enzymes involved in the process of respiration. |
| Nuclear Membrane | Allows certain substances to pass between the nucleus and the rest of the cell. |
| Nucleus | Controls cell activities. |
| Ribosomes | Produce protein within the cell. |
| Vacuole | Stores water and other substances. |