Robert Hooke
Theodor Schwann
Bacteria
Unicellular has one cell and multicellular has more than one cell
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The basic building blocks of all living things
Microscope
living organisms are made up of cells, that they are the basic structural/organizational unit of all organisms, and that all cells come from pre-existing cells.
Virchow used the theory that all cells arise from pre-existing cells to lay the groundwork for cellular pathology
He created the single lens microscope,he did a lot a research on small animals such as fleas. He helped disprove the theory of spontaneous generation.