Cell Theory Timeline

By anliu
  • The first microscope is invented.

    The first microscope is invented.

    The first microscope is invented by lensmakers Zaccharias and Hans Janssen.
  • Robert Hooke looks at a slice of a cork through a microscope.

    Robert Hooke looks at a slice of a cork through a microscope.

    Hooke looks at a slice of a cork through a microscope and observes small, box-like, structures that he called cells.
  • Livings cells are observed for the first time.

    Livings cells are observed for the first time.

    Antony van Leeuwenhoek becomes the first to observe living cells through a microscope.
  • Schleiden states that all plants are made of cells.

    Schleiden states that all plants are made of cells.

    After observing many plants, Matthias Schleiden discovers that all plants are made of cells. He is one of the two main contributors to the Cell Theory.
  • Schwan states that animals are made of cells.

    Schwan states that animals are made of cells.

    Theodor Schwan made many investigations and discovered that animals are also made of cells. He is one of the two main contributors to the Cell Theory.
  • The cell membrane is discovered.

    The cell membrane is discovered.

    Carl Naegeli and C. Cramer discover the cell membrane.
  • Virchow states that cells come from prexisting cells.

    Virchow states that cells come from prexisting cells.

    Rudolf Virchow contributes to the cell theory by stating "Cells come from prexisting cells".
  • Chloroplasts are discovered.

    Chloroplasts are discovered.

    Chloroplasts are first discovered by Russian botanist Konstantin Mereschkowsky.
  • First Electron Microscope Prototype

    First Electron Microscope Prototype

    German physicist Ernst Ruska along with the electrical engineer Max Knoll, makes the first electron microscope prototype.