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The Discovery of the Cell

The Discovery of the Cell. Dutch lens grinder Produced the first compound microscope (2 lenses). Around the same time as Hooke. Dutch fabric merchant and amateur scientist Looked at blood, rainwater, scrapings from teeth through a simple microscope (1 lens)

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The Discovery of the Cell

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  1. The Discovery of the Cell

  2. Dutch lens grinder • Produced the first compound microscope (2 lenses)

  3. Around the same time as Hooke • Dutch fabric merchant and amateur scientist • Looked at blood, rainwater, scrapings from teeth through a simple microscope (1 lens) • Observed living cells, called some ‘animalcules’ • Some of the small ‘animalcules’ are now called bacteria

  4. English scientist • Looked at a thin slice of cork (oak cork) through a compound microscope Robert Hooke (1665) • Observed tiny, hollow, room-like structures • Called these structures ‘cells’ because they reminded him of the rooms that monks lived in • Only saw the outer walls (cell walls) because cork cells are not alive

  5. The men of the Cell Theory • German botanist • Viewed plant parts under a microscope • Discovered that plant parts are made of cells Matthias Schleiden (1838)

  6. The men of the Cell Theory • German zoologist • Viewed animal parts under a microscope • Discovered that animal parts are made of cells Theodor Schwann (1839)

  7. Just one more… • German physician • Stated that all living cells com only from other living cells Rudolf Virchow (1855)

  8. 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

  9. Visualizing Cells

  10. DO not contain a nuclei Smaller and less complicated than eukaryotes Carry out EVERY activity associated with living things GRRSNERT Example: BACTERIA Unicellular Contain a nuclei in which genetic material is separated from rest of cell Larger and more complex than prokaryotes Great variety Plants Animals Fungi Protists Unicellular or Mulitcellular Prokaryotes vs. Eukaryotes

  11. Prokaryotic Cells • Some use flagellum for locomotion • threadlike structures protruding from cell surface Bacterial cell wall Rotary motor Sheath Flagellum

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