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Cells
Vocabulary
Cells – building blocks of
life.
Tissues – a group of cells
that work together as a
team.
Organs – a group of tissues
working together to
perform a specific job
Organ system – a group of
organs that work together
to perform particular jobs.
An example is the
digestive system.
Vocabulary
Organism – anything
that can live on its
own.
 Unicellular – single
cell living on its own.
 Multi-cellular – group
of cells that can only
exist when they are
together.
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Vocabulary
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Population – a group of
organisms that are of the
same kind and that live in
the same area.
Communities – 2 or
more different
populations that live in
the same area.
Ecosystems – the
community and all nonliving that affect it, such
as water, soil, rocks,
temperature, and light.
Vocabulary
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Cell membrane – acts as a
barrier between inside of the
cell and the cell’s environment.
It also controls the passage of
materials into and out of the
cell.
Organelles – chemicals and
structures that enable the cell
to live, grow and reproduce.
Cytoplasm – cellular fluid
surrounding a cell’s organelles.
Nucleus – the membrane
covered organelle found in
eukaryotic cells; contains the
DNA and serves as a control
center for the cell.
Eukaryotic vs. Prokaryotic cells
Eukaryotic – a cells
contains a nucleus and a
complicated internal
structure.
 Has a nucleus
 Membrane-covered
organelles
 Linear DNA
 Complex cell
 All other cells
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Prokaryotic – world
smallest cells and they do
not have a nucleus .
DNA is one long, circular
molecule shaped like
rubber band.
No nucleus
No membrane –covered
organelles
Circular DNA
Simple cell
Bacteria