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History of Cell Theory

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

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History of Cell Theory

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  1. History of Cell Theory G.Burgess Updated 2010.

  2. 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

  3. 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.

  4. Discovery of the Cell • 1831, Robert Brown, Scotland, described the nucleus as a small-round-dense 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.

  5. 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.

  6. 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

  7. 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.

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