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Cell Organelles
The Parts Inside of a Cell
A Look Inside the Cell
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Each cell contains smaller parts
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Organelle = tiny cell structure that carries
out a specific function within the cell
Surrounding the Cell
Cell Membrane
(a.k.a. Plasma Membrane)
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Outer membrane of cell
that controls what comes
into and out of the cell
Allows good stuff in and
lets wastes out of cell
“gateway” of the cell
Cell Membrane is a screen
What does a window screen do?
 What things are kept out of a window
screen?
 What things can get in a window screen?
 A screen is similar to the cell membrane in
a cell.
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Cell Wall
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http://library.thinkquest.org/12413/structures.html
Not all cells have cell
wall!
Most commonly found
in plant cells &
bacteria
Not in animal cells
Supports & protects
cells
Inside the Cell –
The Center
Nucleus
Cell’s control center – directs cell’s
activities
 Separated from the rest of the cell by
nuclear membrane
 Contains genetic material – DNA
 BRAIN of the cell
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Inside the Cell –
In the Cytoplasm
Cytoplasm
Gel-like mixture that constantly moves
 Between cell membrane and nucleus
 Holds organelles
 Site for chemical reactions
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Endoplasmic Reticulum (ER)
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http://library.thinkquest.org/12413/structures.html
Moves materials around in
cell
Smooth type: lacks
ribosomes
Rough type (pictured):
ribosomes embedded in
surface
Like the highway system
for the cell
Ribosomes
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Make proteins
Each cell contains
thousands
Found on endoplasmic
reticulum & floating
throughout the cell
“Factories” for the cell
http://library.thinkquest.org/12413/structures.html
Mitochondria

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Convert energy in food
molecules (sugars) to
energy (ATP) the cell can
use to carry out its
activities
“Powerhouse” or “Energy
Plant” of cell
http://library.thinkquest.org/12413/structures.html
Golgi Bodies or Golgi Apparatus
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Looks like stacked
“pancakes”
Protein 'packaging
plant'
Move materials within
the cell
Move materials out of
the cell
Like the “UPS store”
for the cell
http://library.thinkquest.org/12413/structures.html
Lysosome
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Contains chemicals that
breaks down some
materials in cell
“janitor” for the cell
http://library.thinkquest.org/12413/structures.html
Vacuoles
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Provide storage for
cell
Store materials
needed for cell
Also store wastes for
cell
http://library.thinkquest.org/12413/structures.html
Chloroplast
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Usually found in plant
cells (Autotrophs)
Contains green
chlorophyll
Where photosynthesis
takes place
Captures energy from
sunlight to make
energy for cell
http://library.thinkquest.org/12413/structures.html