Download Cells Intro

Lesson: Cells
Science Differentiation in action
All living things are made up of cells.
Your body has about
100 million million cells.
Science Differentiation in action
Cells are very small.
We use a microscope
to look at cells.
Science Differentiation in action
Parts of a microscope
Eyepiece
Objective lens
Stage
Light
Coarse focus
Fine focus
Science Differentiation in action
Click to discover the function of each
labelled part.
Eyepiece
To magnify the image
Objective lens
Coarse focus
To focus on image
To find an image
Stage
To hold slide
Light
To illuminate image
Fine focus
To find a clear
image
Science Differentiation in action
Can you find these parts on your own
microscope?
Eyepiece
Objective lens
Stage
Light
Coarse focus
Fine focus
Science Differentiation in action
Using the microscope to look at onion cells.
What do you need for
this experiment?
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A plant cell
cell wall
cell membrane
vacuole
nucleus
chloroplast
cytoplasm
Science Differentiation in action
An animal cell
cell membrane
small vacuole
nucleus
cytoplasm
Science Differentiation in action
What parts do plant cells and animal cells
have in common?
cell membrane
cytoplasm
nucleus
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What parts do plant cells and animal cells
NOT have in common?
cell wall
large vacuole
chloroplast
Science Differentiation in action
What is the function of each part?
Controls what
enters and leaves
the cell
Holds cell
contents
Controls the
activities of the
cell
cell membrane
cytoplasm
nucleus
Science Differentiation in action
What is the function of each part?
cell wall
Provides support
large vacuole
Stores food
chloroplast
Makes food
Science Differentiation in action
Review Question
Label each part in the diagram.
A
F
B
E
D
C
Science Differentiation in action
Question to think about
Why do animal cells not have a (i) cell wall or
(ii) chloroplasts?
cell wall
chloroplast