1. The Cell Theory Biology Cell facts Discovery of cells Robert Hooke
Anton van Leuwenhoek
Spontaneous Generation
Louis Pasteur
Matthias Schleiden
Theodor Schwann
The initial cell theory
The modern day cell theory
The two types of cells

2. Biology Biology is the study of life It helps answer the questions:
How do we function?
Why do we act and like the things we do?

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4. Some Cell Facts
The average human being is composed of around __________
There are over 200 different kinds of cell in your body
The biggest cells are nerve cells which can be greater than a metre and be seen even without a microscope.
Every cell in your body has the exact same instructions. …

5. Discovery of Cells 1665- English Scientist, ___________
He described the cells as tiny boxes or a honeycomb …
Hooke's Microscope

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7. Anton van Leuwenhoek
1673- Used a handmade microscope to observe pond scum & discovered single-celled organisms …
He also observed blood cells from fish, birds, frogs, dogs, and humans
Therefore, it was known that cells __________
Leuwenhoek’s handmade microscope 1
1 Photo credit: Jeroen Rouwkema

8. Year Gap
Between the Hooke/Leuwenhoek discoveries and the mid 19th century (1850’s), very little cell advancements were made.
This is probably due to the widely accepted, traditional belief in ____________
Examples:
-Mice from dirty clothes/corn husks
-Maggots from rotting meat ? = +

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10. Development of the Cell Theory
1838- German Botanist, …
1839- German physiologist, ____________
Matthias Schleiden Theodor Schwann

11. Development of the Cell Theory
1858- Rudolf Virchow - after extensive study of cellular pathology, ___________
Illustration of Virchow's cell theory

12. The Initial Cell Theory
The 3 Basic Components of the Cell Theory were then complete:
________

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15. The Two Main Types of Cells
_________
No nucleus
Very simple organisms
Archaea and Bacteria
Eukaryotes
_______________

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