When a germ enters the body this

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When a germ enters the body this

• is how it goes...

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The First Part

• The first part of the immune system is the skin.
  The skin acts as a primary boundary between germs
  and your body. It is a bulwark to germs!!

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Another way that a germ might enter your body is
through your nose, mouth, and eyes. Your nasal
passage is coated with mucus. The virus could
get trapped in the mucus. It then gets
swallowed.
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This picture shows where the parts of the
Immune System are located.
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The Macrophage

• After a virus escapes through the skin, it
  encounters the macrophages. It tries to eat the
  antigen. This acts as the garbage. If the
  macrophage can not kill the virus it then calls
  upon the helper T- cells.

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Helper T- Cells

• The helper T- cell identifies the virus. If the
  body has already had the virus then it is killed
  more quickly. But, if this is a new virus then
  the helper T- cells identify it as a foreign
  virus.

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The B- Cells

• Then the B- cells come in. The B- cells are in
  action now. They create the antibodies that kill
  the antigen. They circulate the blood and attach
  themselves to the foreign germs. Then other
  cells know that they need to be destructed.

This is a picture of antibobies being marked for
destruction.
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Killer T- Cells

• The antibodies are made according to what the
  virus is. After all of the antibodies are made
  then the killer T- cells come to kill the virus.
  The antibodies bind to the virus. This is the
  last thing that kills the virus.

This picture shows the B- cells producing the
antibodies.
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While the T- cells are killing the virus, the
suppressor T- cells stop the fighting once the
virus is killed. If this is a new antigen then
the memory T-cells remember the virus. If this
same virus tries to enter the body again the
memory T- cells know what it is. The virus can
then be killed faster.
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Thats how a germs is killed!!
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This is the T- cells attacking the germ.
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This is the T- cells being made.
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Bacteria

• Bacteria helps our bodies with digestion.
  Bacteria also helps us by destroying harmful
  organisms within our bodies

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Bacteria

• There are more bacteria cells in our bodies than
  there are human cells

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Bacteria

• Most bacteria cells will grow twice their size
  and split into daughter cells

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Bacteria

• Bacteria are used to make cheese, milk, bread and
  lots of other things

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Bacteria

• 99 of bacteria is helpful to the body

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Bacteria

• Dead or weakened Bacteria and Viruses are used
  for making helpful vaccines

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Bacteria

• Tetanus- failure of muscle

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Bacteria

• Diphtheria- highly infectious bacteria causing
  weakness, high fever, difficulty breathing, and
  is harmful to the tissue to the hart

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Bacteria

• Most bacteria is good for the body

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Vaccines
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What are vaccines?

• Vaccines are dead or
• weakened germs that are
• injected into your blood stream in order to
  teach the body how to fend off that disease

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How are vaccines made?

• These germs can be killed by using chemicals,
  heat, or radiation. Or they can be killed by
  making them go through layers of tissue,like that
  of a chicken egg

• Vaccines are made by Scientists and doctors, they
  weaken or kill the germs then inject them into
  the body.

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How do vaccines work?

• Vaccines work because they trick the body into
  believing that it is actually under attack. The
  body fights back until it defeats the virus and
  you become immunized