1. The Cell Theory

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

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

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

8. WHY???
Because that is what they observed.

9. Spontaneous Generation
This is called…
Spontaneous Generation

10. Spontaneous Generation is NOT TRUE!

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

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

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

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

15. 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 ___

16. There are 3 parts to the Cell Theory

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

18. 2nd part
Cells are the
basic unit of life.

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