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Immune System


Elise Newham

on 22 November 2012

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Transcript of Immune System

And how does it repel diseases? What is our 'Immune System' What is it? The Immune System is what protects us from
bad bacteria and viruses. It is made up of
special cells, proteins, tissues, and organs, including
the thymus, bone marrow, spleen, tonsils
and lymphoid tissues. How does it repel diseases? Using all the special cells, proteins, tissues, and organs, when a virus enters the body, the Immune
System studies the 'invaders' and attempts to
create matching micro-organisms called antibodies.
These antibodies are sometimes called immunoglobulins.
When a perfect match is made, the antibodies can
'lock' the virus particles so that they can't
enter or damage the body's cells. Sometimes, the Immune System heats up the
body to kill the virus particles. We know this as
a FEVER. what do all the parts do? There are many components to the Immune System, but all have
a different function. A few components & their functions are:

Skin - The skin acts as a barrier to keep bacteria out. It has a special anti-bacterial coating, which means ALMOST ALL bacteria that lands on it dies instantly.

Bone Marrow - All cells (like red blood cells, white blood cells and
lymphocytes) are originally created from bone marrow.
Lymphocytes are white blood cells in the vertebrate
Immune System (vertebrate meaning we
have a backbone). There are two main types of lymphocytes, B cells, and T cells. Thymus- The Thymus is responsible for directing the maturation of immature thymocytes into
T cells. T cells 'run' the Immune System. They are like it's 'managers' and tell the other cells how to react to foreign things. Immature thymocytes leave the bone marrow and move to the thymus. When maturing, T cells learn to distinguish the body’s own cells from foreign / diseased cells (which are also called antigens). When the T cells become mature, the get put into the bloodstream. Spleen - the spleen doesn't have one specific function; it
has several. It filters the
blood, destroys old or
damaged cells, and
contains many B & T
cells that search
for antigens
in the blood
as it
Spleen Lymph Nodes - Lymph Nodes
are a bit like the spleen.
They have the same T & B
cells, but they don't
filter through blood;
they filter
through lymph.
(which is
made of
tissues). Lymph is found in different
places in the body, and
circles through a
series of lymph
nodes - which
are found
the body
to the
blood. Antigens enter the lymph nodes either
by circulating with lymph or by being
ingested by a cell which then travels
to the lymph node. The
lymph node then makes
sure that the antigen
is removed from the
lymph before it
returns to the
circulation. Here is a YouTube clip
to explain further... A drug or other preparation used for the treatment or prevention of disease. What is it? What is Medicine? Recommended Childhood Vaccination Chart What is Medicine? And how do they help us? What are vaccines? Vaccines work by injecting a small amount of the disease into the body, the amount of disease is so small that the Immune System defeats it easily, but this teaches the Immune System to defeat the real thing before you notice any symptoms. How do they work? Vaccines are injections that you get at certain points of your life, to prevent diseases from occurring in your body.
Most people get lots of vaccines as and infant. The common injections you get as a baby are:
Birth – Hep B
2 months - DTaP, Hib, IPV, PCV, Rota
4 months - DTaP, Hib, IPV, PCV, Rota
6 months – DTaP, Hib, PCV, Rota
6-18 months - Hep B, IPV What are they? Antibiotics is what helps your immune system get rid of bad bacteria. If your immune system has failed to destroy the virus, then you will start to notice symptoms, for example: you might start to get a tummy-ache. As antibiotics is a poison (but a selective one to kill bacteria and not you), if you take it it will work to get rid of the bad bacteria in your stomach. If the virus is strong, you may need to take the medicine every night or so, to make the aching go away. BUT ALWAYS READ THE BOX! Because every circumstance is different and too much medicine might HURT you! How does it work? The End! YouTube
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