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Cell theory lab:
Group leaders must choose who reads each slide!!!
Cells make up all
living things!!!!!
Cell theory
You can use the books or computer for your research 
1.
What is the cell theory?
2. Who helped write the cell theory?
List 3
3. List 3 parts of the cell theory?
4. What is mitosis?
5. What are the life functions of a cell?
6. Create a timeline that describes
important dates in cell theory and
microscope history.
All living things are made up of cells.
• Bacteria cells
• Protozoa cells
• Fungi cells
• Plant cells and
• Animal cells
the story of the Cell theory
•
1
In 1665, Robert Hooke used a microscope to look at a thin
slice of cork. He saw tiny little shapes that looked like little
rooms with walls around each of them. He named them cellulae.
This Latin word means "little rooms."
2
Almost two hundred years passed by. Microscopes were
improved.
• In 1838, Matthias Schleiden saw that all plants were made of
cells.
• At almost the same time, Theodor Schwann saw that all animals
were made of cells.
• In 1855, Rudolf Virchow determined that all cells came from
other cells. These three things are the basis of the Cell Theory:
1. All living things are made of one or more cells.
2. Cells are the smallest unit of life.
3. All cells come from other cells.
CELLS
• CELL THEORY states:
– CELLS ARE THE basic UNIT
OF LIFE to complete basic
life functions: reproduction,
respiration, excretion, growth, nutrition, &
metabolism
– ALL CELLS HAVE DNA
– ALL CELLS come FROM
older CELLS
• The CELL THEORY states
that all organisms are
made of similar units of
organization, called cells.
• The theory was published
in 1839 by Schleiden &
Schwann.
Robert Hooke discovered the first cells.
Cork Cells were thought to have been these
cells.
Anton von Leeuwenhoek was first to
observe one celled living things.
Examples of these were bacteria and
parameciums.
Early Cell theory history
•
Robert Hooke - The first person to see cells,
he was looking at cork and noted that he
saw "a great many boxes. (1665)
•
Anton van Leeuwenhock - Observed living
cells in pond water, which he called
"animalcules" (1673)
•
Theodore Schwann - zoologist who
observed that the tissues of animals had
cells (1839)
•
Mattias Schleiden - botonist, observed that
the tissues of plants contained cells ( 1845)
•
Rudolf Virchow - also reported that every
living thing is made of up vital units, known
as cells. He also predicted that cells come
from other cells (mitosis is cell
reproduction). (1850 )
Step 1: Discovery of Microorganisms
• Anthony Van
Leeuwenhoek made
one of the earliest
microscopes.
• Discovered microorganisms which he
called animalcules.
• Microscopes not as
good as today.
Microscope scientists
• Formulation of the Cell Theory
•
In 1838, Theodor Schwann and Matthias
Schleiden describe plant cells and animal
cells.
• Rudolph Virchow's "All cells come from
other older cells".
Cell theory
• . Schwann published his book on animal cells
(Schwann 1839)
• Schleiden’s book about plant cells (1838).
• 3 theories about cells:
1. Every living organism is made of one or
more cells. All Cells have DNA.
2. The cell is the basic unit of structure and
function. It is the smallest unit that can
perform life functions.
3. All cells come from pre-existing cells.
• (cell reproduction is mitosis)
Cell theory
The Cell Theory includes:
1. All living things are made up of cells.
2. The cell completes all life functions- reproduction, excretion, growth,
nutrition, & metabolism.
3. All cells come from other cells by reproduction (mitosis).
4. Cells contains hereditary information (DNA) which is passed from cell to cell
by mitosis
Cell theory
You can use the books or computer for your research 
1.
What is the cell theory?
2. Who helped write the cell theory?
List 3
3. List 3 parts of the cell theory?
4. What is mitosis?
5. What are the life functions of a cell?
6. Create a timeline that describes
important dates in cell theory and
microscope history.