Download Plants Animals Fungi Bacteria Protists

11/12/2012
What
???
the
???
Cell
???
Set 2: Bell Ringer #3
List 5 things made of cells
The Cell Theory
Cells are the basic units of life
All living things are made up of cells.
New cells are made from existing cells.
This theory applies to : bacteria, multicellular organisms,
unicellular organisms, plants, animals – anything living!
What the Cell?!
Plants
Animals
Fungi
Bacteria
Protists
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11/12/2012
Who Discovered the Cell Theory?
1665 – Robert Hooke
• Looked at cork & named cells
1674 – Anton van Leeuwenhoek
• Looked at living cells & improved microscope
1838 – Matthias Schleiden
• Looked at plants & determined that plants were made of cells
1839 – Theodor Schwann
• Looked at animals & determined that animals were made of cells
1855 – Rudolph Virchow
• Stated that all cells come from other living cells
How Did They See the Cell?
They used microscopes!
 Micro means ________.
SMALL
 A microscope is a tool we use to see small
objects.
What the Cell?!
size & _____
shape of a cell relate to its function.
The ____
I am a
heart cell!
I am a
skin cell!
I am a
prison
cell!
Cell Specialization – Division of Labor
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11/12/2012
What the Cell?!
All cells have 4 things in common:
Surrounded by a barrier = Cell Membrane
Cytoplasm
Ribosomes
At some time, they contain DNA
Molecule that carries genetic info
What is an Organelle?
Internal structure
Enclosed in a membrane
 Thin layer of cover or lining
Specific function (job)
“Little Organ”
Organelles
What is a Nucleus?
Large structure
Enclosed in a membrane
 Thin layer of cover or lining
Contains the cell’s DNA
Controls many cell activities
Nucleus
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11/12/2012
Types of Cells
Prokaryote
Pro = No
Eukaryote
No nucleus.
Genetic material
NOT contained in
a nucleus
Nucleus that
contains genetic
material
Generally smaller
& simpler
Generally larger
& more complex.
Have
membrane-bound
organelles.
Bacteria
Plants, Animals,
Fungi, & Protists
Types of Cells
Venn Diagram of Cell Types
Prokaryotes
•No nucleus
•Smaller
•Simpler
•Cell membrane
•DNA
•Carry out a
variety of
activities
•Cytoplasm
•Ribosomes
Eukaryotes
• Nucleus
• Larger
• Complex
• Membrane-bound
organelles
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