Chapter 3

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Chapter 3 Section 1

• The Discovery of Cells

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Robert Hooke

• 1st to describe cells
• Looked at cork and named the boxes cells
• Saw juice in cells these were living cells

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Anton van Leeuwenhoek

• Observed small organisms in the water. He named
  these organisms animalcules.
• Today, we call these single-celled organisms
  protists (PROH tists).
• First person to see bacteria.

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Matthias Schleiden

• He studied plants and concluded that all plant
  parts were made of cells

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Theodor Schwann

• Concluded that all animal tissues were made of
  cells
• Wrote the first two parts of the cell theory.

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Rudolf Virchow

• A doctor that stated that all cells could form
  only from other cells
• Responsible for the 3rd part of the Cell Theory
• All cells come from existing cells

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The Cell Theory

• All organisms are made of one or more cells
• The cell is the basic unit of all living things
• All cells come from existing cells