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Cell Theory

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Over time, the cell became more complex and able to do more things ... 1665 Robert Hooke looked at cork under the microscope and saw small 'rooms' he ... – PowerPoint PPT presentation

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Title: Cell Theory


1
Cell Theory
2
Ancient cells
  • First cell-about 3.5 billion years ago
  • Different from cells today
  • Over time, the cell became more complex and able
    to do more things
  • Most cells are microscopic and have even smaller
    parts inside called organelles which means
    small organs

3
Cell Theory Scientists
  • 1665 Robert Hooke looked at cork under the
    microscope and saw small rooms he called cells.
    (were actually cell walls)

4
  • 1665 Anton van Leeuwenhoek-looked at blood,
    water, other materials. First person to see
    living cells. He called them animalcules.
  • Some of these were actually bacteria
  • Bacteria Sperm

5
Anton van Leeuwenhoeks Microscope
6
  • Over the next 200 years, microscope technology
    greatly improved.
  • Mid-1800s
  • Mathais Schleiden-looked at plant parts and
    determined all plants are made of cells
  • Theodor Schwann-looked at animal parts
  • and determined all animals are
  • made of cells
  • Rudolph Virchow-experimented to see if living
    cells could arise from dead cells

7
The Cell Theory
  • The discoveries of all 5 scientists led to the
    cell theory which is stated as
  • All living things are made of cells
  • Cells are the basic units of structure and
    function in living things
  • Living cells come only from other living cells
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