Cell Timeline

By superav

  • Compound Light Microscope

    1. Has two lenses - ocular (eyepeice) and objective
    2. In order to be viewed, specimen must be thin (so that the light may shine through the specimen) and placed on a slide
    3. Speciemen may be stained to see better structures

  • Robert Hooke

    Invented the first microscope and was the first to observe and name the small units that make up organisms. He called those small units cells because of the appearance of the structures in the dead cork he observed
  • Period: to

    Anton van Leeuwenhoek

    Improved the micrscope and procedures for observing cells. He was able to clearly see living cells when oberving the scrapings from his teeth

  • Schleiden

    Discovered that all plants are made up of cells

  • Schwann

    Discovered that all animals are made of cells

  • Cell Theory

    Through the cooperative efforts of many individual scientists, a unifying cell theory developed
    1. All organisms are made of cells
    2. Cells are the structual and functional units of organisms.
    3, All cells come from pre-existing cells
  • Period: to

    Scanning Electron Microscope

    1. Uses electrons to produce A HIGHLY MAGNIFIED image
    2. Types: a. Scanning Electron Microscope (Sem) i. Electrons scan the surface of a specimen ii. Produces a 3-D image b. Transmission Electron Microsope (TEM) i. Designed to look at structures inside a cell ii. Capable of greatest magnification