http://koning.ecsu.ctstateu.edu/cell/cell.html
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All living things are made up of cells.
Cells are the smallest working units of all living
things.
All cells come from preexisting cells through
cell division.
A cell is the smallest unit that is
capable of performing life functions.
Amoeba Proteus
Plant Stem
Bacteria
Red Blood Cell
Nerve Cell
•Prokaryotic
•Eukaryotic
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Do not have
structures
surrounded by
membranes
Few internal
structures
One-celled
organisms, Bacteria
http://library.thinkquest.org/C004535/prokaryotic_cells.html
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Contain organelles surrounded by membranes
Most living organisms
Plant
http://library.thinkquest.org/C004535/eukaryotic_cells.html
Animal
http://web.jjay.cuny.edu/~acarpi/NSC/images/cell.gif
http://waynesword.palomar.edu/images/plant3.gif
Organelles
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http://library.thinkquest.org/12413/structures.html
Outer membrane of
cell that controls
movement in and out
of the cell
It is semi-permeable
i.e. let some substances
to pass through while
stops others.
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http://library.thinkquest.org/12413/structures.html
Most commonly
found in plant cells
& bacteria
Made of a rigid
material called
cellulose
Supports & protects
the cells
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Directs cell activities
Separated from cytoplasm by nuclear
membrane
Contains genetic material - DNA
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http://library.thinkquest.org/12413/structures.html
In nucleus
Made of DNA
Contain instructions
for traits &
characteristics
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Gel-like mixture
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Surrounded by cell membrane
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Site for chemical reactions such as
respiration
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Membrane-bound
sacs for storage and
digestion
Contains water
solution
Help plants
maintain shape
Some animal cells
may have tiny
vacuoles
http://library.thinkquest.org/12413/structures.html
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Usually found in
plant cells
Contains green
chlorophyll
Where
photosynthesis takes
place
http://library.thinkquest.org/12413/structures.html
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Cells with modified or improved designs
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To enable them to perform a specific function
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The following types of animal cells have
adapted in order to better perform their
function.
White blood cells
Red blood cells
Nerve cells
Ciliated epithelial cells
Smooth muscle cells
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The following plant cells have adapted to do
their job more efficiently
Root hair cells
Palisade mesophyll cells
Spongy mesophyll cells
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A group of identical cells performing the same
function form a tissue
Tissues of several type work together to make
an organ
Some organs and tissues form organ systems
All organ systems work in harmony for the
well being of the organism