Download The Cell

Levels of
Organization
Living organisms are considered
to be “highly organized”
This means that they are made
up of different components
working together in a specific
way.
Your body has many organs,
such as a heart and _________
Plant organs include stems and
____________
Animal and plant organs are
organized into organ systems
like the skeletal system and
__________
What do both plants and
animals have in common?
Plants and animals are both
made of smaller parts working
together to form a whole.
Levels of Organization
1.
2.
3.
4.
5.
Cell
Tissue
Organ
System
Organism
http://www.yellowtang.org/animations/organization.swf
vocabulary
word!

Cell
cell - the smallest unit of structure and
function of living things
unicellular


Unicellular organisms are made up of just
one cell that performs all of its life
functions.
Unicellular organisms do not have levels of
organization.
diatoms
euglena
vocabulary
word!

Tissue
tissue – a group of similar cells that
perform a specific function
ground tissue in leaf
animal tissues
muscle tissue
epithelial tissue
nerve tissue
connective tissue
plant tissues
protective tissue
transport tissue
ground tissue
vocabulary
word!

Organ
organ - group of at least two tissues
working together to perform a specific
function.






heart
lung
stomach
brain
leaf
stem
organ system

system - a group of two or more organs
that work together to perform a function.




skeletal system
circulatory system
muscular system
nervous system
vocabulary
word!

Organism
organism - combines cells, tissues, organs,
and systems
multicellular



Multi-cellular organisms are made of more
than one cell.
They have levels of organization.
Cells that make up multi-cellular
organisms may have specific functions.
multicellular

Cells, tissues, organs and organ systems
make up the structure of multi-cellular
organisms.
Design your own in your notes.
Organism needs

All living organisms need certain things to
live

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Obtain energy (photosynthesis and
respiration)
Eliminate waste
Respond to stimuli
grow
Reproduce