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The Cell Theory

Explore the history of cell theory and how early beliefs in spontaneous generation were disproven. Learn about the contributions of key scientists such as Van Leewenhoek, Hooke, Schleiden, Schwann, and Virchow.

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The Cell Theory

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  1. The Cell Theory

  2. Long ago people believed… “Mice came from oldgrain sacks.”

  3. People thought… “Frogs came from mud.”

  4. People thought… “Maggots came from rotting meat.”

  5. WHY??? • Because that is what they observed.

  6. This is called… Spontaneous Generation

  7. Spontaneous Generation is NOT TRUE!

  8. People created that theory because they had no better idea of how these organisms really were created.

  9. Now the real story… • Scientists started to test the old theories and found them to be incorrect.

  10. Video clip, coming up… • Write these names in your notes, one person per line. • Van Leewenhoek • Hooke • Schleiden • Schwann • Virchow

  11. Video Clip 6:11 • “The Wacky History of Cell Theory”

  12. What contributions did the previous people make towards the development of the cell theory? • Van Leewenhoek-The first ______ • Hooke -Named first ______ • Schleiden -All ____ made of cells • Schwann -All ____ made of cells • Virchow -All ___ come from ___

  13. There are 3 parts to the Cell Theory

  14. 1st Part All cells come from existing cells.

  15. 2nd part Cells are the basic unit of life.

  16. 3rd part All living organisms are made of cells.

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