Types of Cells

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Types of Cells
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Robert Hooke

• In 1665, Robert Hooke was the first person to use
  the term cell in reference to Biology because
  of the units of dead cork cells reminded him of
  the small boxy living quarters of monks called
  cells.
• He also made the first simple microscope
  containing only three lenses.

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Anton van Leeuwenhoek

• Leeuwenhoek improved upon the simple microscope
  by making better lenses.
• He was the first to discover and describe red
  blood cells and bacteria taken from scraping off
  his teeth.

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Cell Theory

• All living things are made of one or more cells.
• Cells are the basic units of structure and
  function in organisms
• All cells arise from existing cells.

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Prokaryotic Cells
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Prokaryotic Cells

• A prokaryotic cell lacks a nucleus and
  membrane-bound organelles.
• Contains single strand DNA in a ring.
• Contains ribosomes.
• Smaller than eukaryotic cells.

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Eukaryotic Cells
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Eukaryotic Cells

• Eukaryotic cells are found in all organisms
  except in the Kingdoms Eubacteria and
  Archaebacteria.
• They contain a true nucleus and membrane bound
  organelles.
• An organelle is a tiny organ found in cells.