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Can you sort these pictures into 3 categories?
Bacteria: No nucleus,
have a cell wall.
Viruses: Smaller than
bacteria, have a strand
of DNA inside protein
coat.
Fungus: Long thin
threads or small and
round. Biggest out of
the microbes.
What title would you give each category?
virus
bacteria
fungus
The immune System
• Lesson Learning Outcomes:
State the
optimum
conditions
needed for the
reproduction of
microorganisms
Identify
different
parts of the
immune
system
Increasing Difficulty
Explain how the
immune system
can prevent
infection
Clue?
Requirements
for the
reproduction of
microorganisms
How do bacteria
reproduce?
• Listen-Draw
• Listen to the explanation – draw what you
hear
Listen-Draw
•
•
•
•
•
Pair-share
Find a partner in the room
Use your drawings to explain ‘binary fission’
Then listen to your partner
Repeat this with another 2 partners
• EXTENSION Q
1. If there is only 1 bacterium, how many will there be
after 1 hour?
2. If there is 3 bacteria to begin with, how many will
there be after 2 hours?
• Bacteria reproduce asexually through binary
fission
Fighting disease
If pathogens do enter our body they need to be
neutralised or killed. This is done by WHITE BLOOD
CELLS as part of the immune system:
White blood cells do 3 things:
1) They eat the pathogen
2) They produce antibodies to neutralise
the pathogen
3) The produce antitoxins to neutralise
the poisons produced by pathogens
Left hand page
What is the immune system?
Write a definition.
What “colour” of blood cells
make up the body’s defences
against harmful microorganisms?
Right hand page
Immune system
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The immune system
The immune system is made up of special
cells, proteins, tissues, and organs, defends
people against germs and microorganisms
every day.
Right hand page
What is the immune system?
Write a definition.
What “colour” of blood cells
make up the body’s defences
against harmful microorganisms?
Watch the “Cold War”.
Note down any CELL TYPES
that are mentioned. Use
bullet points. Try to note
down their functions too.
Left hand page
Immune system
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•Throat cell: lines the throat.
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• Macrophage: eats “invaders”
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Give One: Get One
You have 2 minutes to add to your list of cells
and their functions. You can only Give and Get
from the same person once.
Right hand page
Left hand page
Summary
Draw a cartoon to represent
how the immune system
works
Or
Write a text message
explaining what you have
learnt about how the
immune system works
Or
Priorities the different parts
of the immune system –
which one is the most
important and why?
Immune system
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•Throat cell: lines the throat.
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• Macrophage: eats “invaders”
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