3 How were cells discovered? The first cell was discovered when Robert Hooke looked at cork under a microscope!He saw thousands of tiny empty chambers
4 History of the Cell1839: Schwann concludes that animals are made of cells1838:Schleiden concludes that plants are made of cells1855:Virchow proposes that all cells come from other cells completing the cell theory1665: Hooke discovers the cell1674: Van Leeuwenhoek observed tiny living organisms in pond water
5 Cell Theory All living things are made of cells. A cell is the smallest unit of life.All cells come from preexisting cells.