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Cell Theory
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  • 1. T he Cell T heory and How We Got T here
  • 2. The Cell Theory – a timeline • Late 1500’s: • first lenses used in Europe • used to determine cloth quality (weave and precision) • combos of lenses gave better view
  • 3. Robert Hooke ( 1665) • • Used light microscope to look at thin slices of plant tissues -- cork Called tiny chambers “cells”
  • 4. Anton Von Leeuwenhoek 1673 • • • • Leeuwenhoek First to view pond water organisms First to see living microscopic organisms Made careful sketches
  • 5. Robert Brown 1827 • Noticed that all cells have a dark region. Called it the “Nucleus”
  • 6. Matthias Schleiden 1838 • • German Botanist (studied plants) All plants looked at were made of cells, so concluded: “All plants are made of cells.”
  • 7. Theodore Schwann -- 1839 • • German scientist who studied animals -- zoologist Saw that all animals he studied were cellular so concluded: “All animals are made of cells.”
  • 8. Rudolf Virchow -- 1855 • German physician who studied cell reproduction “Where a cell exists, there must have been a preexisting cell…..”
  • 9. The Cell Theory • • • All living things are composed of cells Cells are the basic units of structure and function in living things New cells are produced from existing cells
  • 10. The Cell Theory • • • All living things are composed of cells Cells are the basic units of structure and function in living things New cells are produced from existing cells