Cell Theory
Defining something invisible that you look at all day
What we will talk about
Cell Theory
First we Review
Testable explanation of a situation.
Explanation of Natural Phenomenon based on many observations and investigations OVER TIME
Cell Theory
History of the Cell Theory
More than just a day in the making
Cell Theory
First we had to open our eyes.
Cell Theory
Invention of the Microscope
1590 Dutch lens grinders Hans and Zacharias Janssen invent the compound microscope
Cell Theory
But it takes almost 80 years..
Robert Hooke – 1665 English Scientist observes cork and calls the tiny chambers cells, For Cellulae (Latin for small rooms)
Cell Theory
Another look
Anton van Leeuwenhoek – 1683 Designs his own microscope and discovers microscopic animals in water
Matthias Shleiden – 1838 Concluded that all Plants are made of cells
Theodor Schwann – 1839 Concluded that all Animals are made of cells
Cell Theory
One more look
Rudolph Virchow – 1855 All cells come from the division of existing cells
Cell Theory
Throw it all together
Combining centuries of studies that have been aided and enabled by better technology
Cell Theory
The Cell Theory
Cell Theory
References
Cell Theory