The Immune System

1
The Immune System

• The bodys line of defense against disease
  happens here.

2
Immune System

• The immune system is a network of cells and
  organs that attacks foreign invaders.
• The immune system is able to distinguish between
  self molecules and non-self molecules.

3
How is it able to do that?

• All tissues and cells that are supposed to be in
  our bodies have a marker on them that lets
  immune cells know not to attack.

4
Whats bad?

• Foreign bodies have distinctive shapes called
  epitopes that protrude from the body.
• When the foreign body is discovered, the immune
  system responds. This is why transplants often
  fail.

• The immune system then produces antibodies.
• Phagocytes are the first line of defense.
• If phagocytes cannot eat all of the
  bacteria/virus, lymphocytes begin fighting.

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Organs of the Immune System

• The lymphatic system is a body wide drainage
  system that brings water and proteins back to the
  blood for disposal or usage. This fluid is
  called lymph.
• The network is the lymph vessels.

6
Lymphatic System
7
Immune System

• The lymphatic system defends the body against
  infection by catching harmful organisms in the
  lymph nodes located along the lymph system.
• These lymph nodes house lymphocytes which make
  antibodies for certain invaders.

8
How are they made?

• The antigen comes into contact with the B cell (a
  lymphocyte) and it makes a Class II MHC receptor
  mechanism.
• The helper T cell then binds to the receptor and
  activate the B cell to release antibodies.

9
Antibodies

• The antibodies are made by the lymphocytes and
  are able to fit into the shapes (epitopes) and
  kill them.

10
So
11
How do we keep it healthy?

• Rest
• Good diet that follows the food guide pyramid
• Exercise
• Relaxation
• Good work habits
• Lots of water

12
Now you tell me what you know

• I need for you to create a concept map using the
  following terminology and others that you may
  have learned immune system, lymphatic vessels,
  lymph nodes, filter, lymph, B cells, lymphocytes,
  epitopes, Class II MHC receptor, phagocytes,
  spleen, appendix, tonsils, disorders, rheumatoid
  arthritis, antigen, helper T cell, AIDS, healthy,
  diet, food pyramid, water, exercise.