| Flap 1 | Flap 2 |
| Hans & Zacharias Janssen | produced first compound microscope |
| Robert Hooke | observed first dead cells |
| Anton van Leeuwenhoek | Dutch Scientist who observed first living cells |
| Matthias Schleiden | German botanist who viewed plant parts under a microscope and discovered that plant parts are made up of cells |
| Theodor Schwann | German zoologist who viewed animal parts under a microscope and discovered that animal parts are made of cells |
| Rudolph Virchow | German physician who stated that all living cells come only from other living things |
