Immunity <ul><li>Learning Objective : </li></ul><ul><li>Understand how the immune system is involved in fighting disease <...
How are microbes passed along? <ul><li>through the air </li></ul><ul><li>through water </li></ul><ul><li>by eating the mic...
Microbes: our defence against them Our bodies have many defence mechanisms against invading microbes: If our skin is cut p...
Fighting disease If microbes do enter our body they need to be neutralised or killed.  This is done by WHITE BLOOD CELLS: ...
Phagocyte engulfs microbe – animation Animation
Lymphocytes and antibodies – animation Animation
Producing antibodies Step 1: The white blood cell “sees” the antigen (microbe) Step 2: The cell produces antibodies to “fi...
Role Play <ul><li>Work in groups of four or five. </li></ul><ul><li>You have 10 minutes to work on a short play, to last a...
A   Microbe multiplies and creates illness. B   Microbe enters body.  C   Body responds slowly.  D   Body responds quickly...
Multiple-choice quiz
Immunity <ul><li>Learning Objective : </li></ul><ul><li>Understand how the immune system is involved in fighting disease <...
Upcoming SlideShare
Loading in …5
×

Y8 Humans 11 immunity

1,063 views

Published on

Year 8 science lesson on how the immune system works. Resources from Education Using Powerpoint, Boardworks & Framework.

0 Comments
0 Likes
Statistics
Notes
  • Be the first to comment

  • Be the first to like this

No Downloads
Views
Total views
1,063
On SlideShare
0
From Embeds
0
Number of Embeds
8
Actions
Shares
0
Downloads
30
Comments
0
Likes
0
Embeds 0
No embeds

No notes for slide

Y8 Humans 11 immunity

  1. 1. Immunity <ul><li>Learning Objective : </li></ul><ul><li>Understand how the immune system is involved in fighting disease </li></ul><ul><li>Starter : </li></ul><ul><li>Name the different types of blood cell, which ones help fight disease? </li></ul>
  2. 2. How are microbes passed along? <ul><li>through the air </li></ul><ul><li>through water </li></ul><ul><li>by eating the microbes especially from contaminated hands </li></ul><ul><li>by touching </li></ul><ul><li>through animals </li></ul>
  3. 3. Microbes: our defence against them Our bodies have many defence mechanisms against invading microbes: If our skin is cut platelets seal the wound by clotting The breathing organs produce mucus to cover the lining of these organs and trap the microbes The skin acts as a barrier Stomach produces stomach acid Tears contain an enzyme that kills bacteria
  4. 4. Fighting disease If microbes do enter our body they need to be neutralised or killed. This is done by WHITE BLOOD CELLS: <ul><li>White blood cells do 3 things: </li></ul><ul><li>They eat the microbe </li></ul><ul><li>They produce antibodies to neutralise the microbe </li></ul><ul><li>They produce antitoxins to neutralise the poisons produced by microbes </li></ul>
  5. 5. Phagocyte engulfs microbe – animation Animation
  6. 6. Lymphocytes and antibodies – animation Animation
  7. 7. Producing antibodies Step 1: The white blood cell “sees” the antigen (microbe) Step 2: The cell produces antibodies to “fit” the antigen Step 3: The antibodies fit onto the antigens and cause them to “clump” Step 4: The antigens are “eaten” by the white blood cells You’re going down
  8. 8. Role Play <ul><li>Work in groups of four or five. </li></ul><ul><li>You have 10 minutes to work on a short play, to last about 2 minutes, based on the white blood cells and how the antibody fights microbes. </li></ul>
  9. 9. A Microbe multiplies and creates illness. B Microbe enters body. C Body responds slowly. D Body responds quickly. Microbe is killed before it has a chance to multiply and cause illness. E Microbe enters body. F Body produces enough antibodies and white blood cells to kill invading microbe. As microbe dies the symptoms disappear. E Microbe enters body. C Body responds slowly. A Microbe multiplies and creates illness. F Body produces enough antibodies and white blood cells to kill invading microbe. As microbe dies the symptoms disappear. B Microbe enters body. D Body responds quickly. Microbe is killed before it has a chance to multiply and cause illness. 8C Vaccination Put these events into the right order.
  10. 10. Multiple-choice quiz
  11. 11. Immunity <ul><li>Learning Objective : </li></ul><ul><li>Understand how the immune system is involved in fighting disease </li></ul>

×