Transcript Cell_Powerpointx

What Do All
Living Things
Have In
Common?
They are
all made
of cells!!
From the smallest
organism, or living
thing, to the
largest, we are all
made of cells.
What is a Cell?
A cell is the smallest
unit that is capable
of performing life
functions.
What is a Cell?
Since the cell is the
smallest unit of living
matter, the processes
of life must be carried
out by the cells.
Important Information
About Cells
• 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.
What Functions Do Cells
Perform?
• Some cells make food.
• Some cells release energy for other cells to use.
• Some cells transport materials within an
organism.
• Some cells carry oxygen throughout the human
body.
• Some cells help fight against infection.
• These are just some of the MANY jobs
performed by cells!!
What Are Living Things Made Of?
• Some organisms are made of just
one cell.
• Other organisms are made of many
similar cells that benefit from
cooperating.
All Organisms are either:
Unicellularconsist of a single(one) cell and perform all
life processes within a single cell
Or
Multicellularconsist of more than one cell (many) and
have different cells that perform special
functions in the organism
Examples of Cells
Amoeba Proteus
Plant Stem
Bacteria
Red Blood Cell
Nerve Cell
• Made of one cell
• The one cell performs all life
functions
• Usually only seen with a
microscope
• Includes amoebas, bacteria and
protozoa
Images of Unicellular
Organisms
More Images of Unicellular
Organisms
Examples of
Unicellular Organisms
• Amoeba
• Unicellular fungi
• Bacteria
• Unicellular yeasts
• Protozoa
• Paramecium
• Unicellular algae
• Made of many cells
• Different cells perform different
functions
• Can be seen by the naked eye (this
means without help or microscopes)
• Includes all plants and animals
• Only surface cells come in contact
with the external environment.
Examples of Multicellular
Organisms
• Humans
• Cats
• Dogs
• Insects
• Birds
• Flowers
• Mold
• Trees
Images of Multicellular
Organisms
So, What’s the Difference?
Unicellular
• Made of one cell
• The one cell performs
all life functions
• Usually only seen with
a microscope
• Bacteria, yeast,
amoebas…
• Main purpose is to
survive
Multicellular
• Made of many cells
• Different cells perform
different functions
• Can be seen by the naked
eye
• Plants, animals…
• Main purpose is to work
together with other cells
in order to support the life
of an organism
So, How Are They Alike?
•
•
•
•
Unicellular and Multicellular
Made of cell(s)
Both need food for energy
Both need food for growth
Both responsible for life functions
Levels of Cell Organization
• Cells are the smallest living part of an organism
• Cells that work together with the same job
form tissue
• Tissues of different kinds come together to
make an organ
• A group of organs that work together to do a
certain job makes up an organ system
Which Type of Organism Am I?
Which Type of Organism Am I?
Which Type of Organism Am I?
Which Type of Organism Am I?
Which Type of Organism Am I?
Which Type of Organism Am I?
Deep in the Mariana Trench, about seven miles below
the surface, researchers found
huge single celled amoebas, making them not only completely
surprising and amazing,
but also the creatures living at the biggest depth found so far.
Which Type of Organism Am I?
Click on the following Links to read
more information about cells
• #1Learn more about • #Learn more about
the discovery of
the discovery of
cellscells• Read-”What is the
• Watch the following
basic unit of life?”
video about cellsand “How is life
organized around
cells?”
Now, Let’s
Answer
Some
Questions!
Why is an
animal
considered to be
multicellular?
How can we best
describe a panda
bear?
Why are single
celled organisms
able to survive?
Name two
examples of
unicellular
organisms?
Name three
examples of
multicellular
organisms?