Cell Theory
Timeline
Taking Notes
• In order to complete your timeline…
– Take notes of the following scientists
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Zacharias and Hans Jansen
Aristotle
Robert Hooke
Anton van Leeuwenhoek
Matthias Schleiden
Theodor Schwann
William Henry Perkin
Rudolph Virchow
– Write down their name, date, and a brief
description of what they did.
Get out Notebook
The Cell Theory
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3.
Cell Scientists
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Name
Date
Period
Cell Theory
1. All living things are made of cells.
2. Cells are the basic units of structure
and function in living things.
(structure = form; function = purpose)
3. Living cells only come from other living
cells.
Aristotle
• 334 B.C.E.
• Aristotle observed nature directly.
• He classified all known organisms as
either plants or animals.
• B.C.E.= Before Common Era
It all started with…
• The first microscope!
– Zacharias and Hans
Jansen
– 1595
– Middleburg, Holland
– Placed two lenses in a
tube
Hans & Zacharias
Janssen
• 1595
• Hans & Zacharias Janssen produced the
first compound microscope by lining up 2
lenses.
Robert Hooke
• 1665
• Robert Hooke observed lining matter (cork
cells) through a compound microscope,
which reveals empty cells.
• He is the first to call the spaces in the
cork “cells” which means little rooms.
Anton van
Leeuwenhoek
• 1675
• Anton van Leeuwenhoek observed living
cells through a simple microscope.
Matthias Schleiden
• 1838
• Matthias Schleiden discovered that plants
were made of cells.
Theodor Schwann
• 1839
• Theodor Schwann states “all animals are
made of cells.”
William Henry Perkin
• 1856
• William Henry Perkin develops an intense
purple dye, which is used to stain slides.
Rudolph Virchow
• 1858
• Rudolph Virchow states…
– “Cells are the last link in a
great chain that forms
tissues, organs, systems, and
individuals. Where a cell
exists, there must have
been a preexisting cell.”
• Cells can only arise from
pre-existing cells
Create a Cell Timeline
• Label the timeline with the dates, scientist names,
and details of the important discoveries.
• The earliest date should be on the left and the most
recent on the right.
• Show a reasonable amount of elapsed time between
dates.
• 8 events & 8 pictures
• Graded on neatness, accuracy, and use of color.
• List Cell Theory and the 3 parts of the Cell Theory.