LN# 8
Cells
Cells
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•
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Cells are the basic unit of living
organisms.
The cell theory describes the connection
between living things and cells.
The cell theory has 3 parts.
The Cell Theory
1. All organisms are
made of one or
more cells.
2. The cell is the basic
unit of organization
of organisms.
3. All cells come from
preexisting cells.
Prokaryote vs. Eukaryote
•
There are two types of
cells.
Prokaryotic cells
1.
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•
2.
Do not have membrane
bound organelles.
They make up single
celled organisms called
bacteria.
Eukaryotic cells
•
•
Contain membrane
bound organelles.
They make up single and
multi cellular organisms.
•
•
Multi = humans
Single = paramecium
Organelles
• Membrane bound structures inside the
cell.
• Organelles allow specialized functions to
occur inside the cell.
• Some organelles include:
– Mitochondria
– Chloroplast
– Nucleus
– Plasma membrane
Plant vs. Animal Cells
Only in Plant Cells
• Cell wall
– provides structure and support
– also found in bacteria and fungi
• Chloroplast
– uses energy from the sun to make
carbohydrates
• Large vacuole
– used for storage
Only in Animal Cells
• Centriole
– help cell during cell division
Summary
1.
2.
3.
4.
5.
6.
What is a cell?
What are the parts of the cell theory?
What is a prokaryotic cell?
What is a eukaryotic cell?
What are organelles?
What is the difference between a plant and
animal cell?
7. What is a chloroplast?
8. What is a centriole?