The Cell Theory Timeline


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The Cell Theory Timeline

  1. 1. The Cell Theory – a timeline<br />Late 1500’s: -first lenses used in Europe<br /> -used to determine cloth quality (weave and precision)<br /> -combos of lenses gave better view<br /> -Hans Janssen and son Zacharias invented first compound microscope in 1590<br />
  2. 2. Robert Hooke ( 1665)<br /><ul><li>Used light microscope to look at thin slices of plant tissues -- cork
  3. 3. Looked empty, like monk’s chamber
  4. 4. Called tiny chambers “cells”</li></li></ul><li>1673<br /><ul><li>Leeuwenhoek
  5. 5. first to view pond water organisms
  6. 6. First to see living microscopic orgs
  7. 7. Made careful sketches</li></li></ul><li>Matthias Schleiden 1838<br /><ul><li>German Botanist (plants)
  8. 8. All plants looked at were made of cells, so concluded:</li></ul>“All plants are made of cells.”<br />
  9. 9. Theodore Schwann -- 1839<br /><ul><li>German scientist who studied animals -- zoologist
  10. 10. Saw that all animals he studied were cellular so concluded:</li></ul>“All animals are made of cells.”<br />
  11. 11. Rudolf Virchow -- 1855<br /><ul><li>German physician who studied cell reproduction
  12. 12. “Where a cell exists, there must have been a preexisting cell…..”</li></li></ul><li>The Cell Theory <br /><ul><li>All living things are composed of cells
  13. 13. Cells are the basic units of structure and function in living things
  14. 14. New cells are produced from existing cells </li>