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Cell Theory
•   State the parts of
    the cell theory.
•   Identify the 2
    types of cells
    (with/without
    nucleus).
•   Name 2 eukaryote
    cells.
Cells & Cell Theory
 In1665, Robert Hooke was the first person
  to describe cells when looking at cork
  with a microscope.
 He observed cells in plants and fungi.


 In 1673, Anton von Leeuwenhoek
  discovered single-celled organisms
  (protists) in pond scum. He was the first to
  see blood cells, bacteria cells, and yeast
  cells.
Cells and Cell Theory
 In 1838, Matthias Schleiden concluded
  that all plants parts were made of cells.
 In 1839, Theodor Schwann concluded
  that all animal tissues were made of cells.
 In 1858, Rudolf Virchow stated that all cells
  could form only from other cells.

 These 3 discoveries led to the cell theory.
Cells and Cell Theory
Cell Theory states:
 All organisms are made of
  one or more cells.
 The cell is the basic unit of
  ALL living things.
 All cells comes from existing
  cells.
Cells and Cell Theory
Cell and Cell Theory
     Prokaryote              Eukaryote
 Single-celled        Multi-cellular
  organisms that DO     organism that DO
  NOT have a            have a nucleus
  nucleus or            and membrane-
  membrane-bound        bound organelles.
  organelles.          Plant and animal
 Eubacteria and
  archaebacteria
Animal Cell
Plant Cell

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Cell theory

  • 1. Cell Theory • State the parts of the cell theory. • Identify the 2 types of cells (with/without nucleus). • Name 2 eukaryote cells.
  • 2. Cells & Cell Theory  In1665, Robert Hooke was the first person to describe cells when looking at cork with a microscope.  He observed cells in plants and fungi.  In 1673, Anton von Leeuwenhoek discovered single-celled organisms (protists) in pond scum. He was the first to see blood cells, bacteria cells, and yeast cells.
  • 3. Cells and Cell Theory  In 1838, Matthias Schleiden concluded that all plants parts were made of cells.  In 1839, Theodor Schwann concluded that all animal tissues were made of cells.  In 1858, Rudolf Virchow stated that all cells could form only from other cells. These 3 discoveries led to the cell theory.
  • 4. Cells and Cell Theory Cell Theory states: All organisms are made of one or more cells. The cell is the basic unit of ALL living things. All cells comes from existing cells.
  • 5. Cells and Cell Theory
  • 6. Cell and Cell Theory Prokaryote Eukaryote  Single-celled  Multi-cellular organisms that DO organism that DO NOT have a have a nucleus nucleus or and membrane- membrane-bound bound organelles. organelles.  Plant and animal  Eubacteria and archaebacteria