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History of Cell Theory G.Burgess Updated 2010. History of the Microscope First invented; 1590, Hans and Zacharias Janssen (originally 3X to 9X), Dutch eye glass makers Anton Van Leeuwenhoek, 1632-1723, designed the best simple microscopes of the time, first person to describe bacteria and protozoans Discovery of the Cell 1665: Robert Hooke, English scientist, described the spaces in cork as cells. He first coined the term cell 1674: Anton Van Leeuwenhoek, Holland, first describes protozoans 1824: Henry Dutrochet, France, proposed that all living things were composed of cells and discovered that plants grew by increasing their number of cells. Discovery of the Cell 1831, Robert Brown, Scotland, described the nucleus as a small-rounddense body common to all plant cells. **1838, Matthais Schleiden, Germany, after a lengthy study concluded that all plants are made of cells. **1839, Theodor Schwann, Germany, concluded that all animals are made of cells. Discovery of the Cell 1839, Johannes Purkinje, Czech Republic, used the term ‘protoplasm’ in reference to the jelly-like material with in a cell. 1858, Rudolph Virchow, Germany, stated that all cells come from other living cells. Cell Theory All organisms are made of cells or cell fragments The cell is the basic unit of structure and function in organisms. Cells are produced from other living cells Continued Discoveries 1857: Kolliker, described the mitochondria 1869: Miescher isolated DNA for the first time. 1879: Flemming described chromosome behavior during mitosis. 1898: Golgi described the golgi apparatus. 1953: Crick, Wilkins and Watson proposed structure of DNA double-helix.
