| A | B |
|---|
| Robert Hooke | examined thin cork slices with a compound light microscope and saw boxlike structures that he called cells |
| Anton van Leeuwenhoek | first to describe single celled organisms. However, he did not realize that he was seeing single celled organisms |
| Robert Brown | coined the term nucleus when he discovered that plant cells contained a small dense round body |
| Matthias Schleiden | stated all plants are made of cells |
| Theodor Schawann | stated that all animals are made of cells |
| Rudolf Virchow | all cells arise from preexisting cells |
| unicellular organism | single celled organism |
| Cell division | the process by which new cells arise from other living cells |
| microscope | instrument that led to the discovery of cells |
| multicellular organism | many celled organism |
| specialized cells | cells with structures which help them do their function |
