01 the discovery of cells
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01 the discovery of cells

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01 the discovery of cells 01 the discovery of cells Presentation Transcript

  • The History of the Cell Theory  Anton van Leeuwenhoek (1600s)  Advanced the microscope and used it to study microscopic organisms  “The father of microbiology”  Robert Hooke (1600s)  Discovered and named „cells‟  Matthias Schleiden (1830s)  All plants are made of cells  Theodor Schwann (1840s)  All animals are made of cells
  • The Cell Theory  All organisms are composed of one or more cells  The cell is the basic unit of structure and organization of organisms  All cells come from preexisting cells
  • The Compound Light Microscope To calculate magnification…  Find the magnification of each lens (objective and eyepiece)  Multiply the magnification of each lens ~1500x magnification
  • The Electron Microscope  Uses a beam of electrons in a vacuum to magnify up to 500,000x  2 types
  • Scanning Electron Microscope
  • Transmission Electron Microscope
  • 2 Basic Cell Types  All cells contain small specialized structures called organelles  Many, but not all, organelles are surrounded by membranes  Organisms with cells that contain membrane bound organelles are called eukaryotes  Organisms without cells that contain membrane bound organelles are called prokaryotes
  • The Nucleus  Contains the DNA  Responsible for cell division  Manages and controls cellular functions