1. The Ultra Fascinating History of Cellular Thought

2. Aristotle 300 BC Greek Philosopher
Developed theory of Spontaneous Generation

3. Spontaneous Generation
Life can suddenly arise out of non-living matter
Not true – but theory was accepted for nearly 2000 years
Why? Because there was evidence….

4. A sack of grain became mice

5. Meat left out became maggots

6. Salamanders came from fire

7. “You’ll catch your DEATH!!!”

8. From a 1951 Disney movie

9. Robert Hooke Early 1660’s English scientist
Invented a crude microscope
Looked at cork
Named “cells”

10. Hooke’s Microscope

11. Hooke’s Drawing of Cork

12. Early 1660’s

13. Francesco Redi Late 1660’s Italian Physician Set out to disprove S.G.
Meat in jars experiment

14. Redi’s Experiment

15. Late 1660’s

16. Anton van Leeuwenhoek 1675 Dutch Inventor Improved Hooke’s microscope
Looked at “animalcules”

17. Anton van Leewenhoek’s Microscope

18. 1675

19. John Needham 1748 Scottish scientist Set up Redi-like experiment
Tried to prove/disprove SG once and for all

21. 1748

22. Lazzaro Spallanzani (Coolest name EVER)
1790
Italian Scientist
Questioned Needham’s experiment
Tried to improve it

23. Spallanzani’s Experiment

24. 1790

25. Louis Pasteur 1864 French Chemist Invented “Swan-necked flask”
Disproved S.G. once and for all

26. Pasteur’s Swan-Necked Flask

27. Pasteur’s Experiment

28. Results
Pasteur’s flasks kept bacteria out of the broth until …….

29. TODAY

30. 1864

31. 2010

32. Rudolph Virchow 1858 Russian Pathologist
Stated “All cells arise from other cells.”

33. Matthias Schleiden and Theodor Schwann
1838
Schlieden – German Botonist
Stated – “All plants are made of cells.”

34. Matthias Schleiden and Theodor Schwann
1838
Schwann – German Zoologist
Stated – “All animals are made of cells.”

35. Schleiden and Schwann Together stated –
“All LIFE is composed of cells”

36. The Cell Theory All life is composed of cells (Schleiden and Schwann)
All cells come from other cells (Virchow and Pasteur)
Cells contain the hereditary information that is passed from parent to offspring (DNA)

37. The Germ Theory Diseases are caused by microorganisms Bacteria Viruses
Fungi
Protists

38. Are we creating Super-Germs?