Transcript Cells Intro

Lesson: Cells
Science Differentiation in action
All living things are made up of cells.
Your body has about
100 million million cells.
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Cells are very small.
We use a microscope
to look at cells.
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Parts of a microscope
Eyepiece
Objective lens
Stage
Light
Coarse focus
Fine focus
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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
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Can you find these parts on your own
microscope?
Eyepiece
Objective lens
Stage
Light
Coarse focus
Fine focus
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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
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An animal cell
cell membrane
small vacuole
nucleus
cytoplasm
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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
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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
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What is the function of each part?
cell wall
Provides support
large vacuole
Stores food
chloroplast
Makes food
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Review Question
Label each part in the diagram.
A
F
B
E
D
C
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Question to think about
Why do animal cells not have a (i) cell wall or
(ii) chloroplasts?
cell wall
chloroplast