Tears and Saliva contain enzymes that destroy and disable pathogens Mucous Membranes are in your mouth, nose, and other parts of your body. The stick substance traps pathogens before they can cause disease and are disposed of. Skin prevents most pathogens from entering the body. Cilia are small hairs that line your airways. They sweep pathogens to the throat where they can be swallowed or coughed out. Gastric Juices destroy pathogens that enter your body through your nose and mouth.
Immune System- A network of cells, tissues,
organs, and chemicals that fight off
The Immune system has 3 lines of defense
1.Physical and Chemical Barriers
2.The inflammatory Response
A reaction to tissue damage caused by injury
Blood Vessels expand around injury to help
fight bring in phagocytes to help fight any
Swelling which causes pain from pressure on
Puss build up from phagocytes and dead tissue.
Phagocytes: white blood cells that fight pathogens
by surrounding and destroying them.
Body repairs the tissue.
If the first two lines of defense are not
effective then the third line is activated.
This line of defense is activated for specific
pathogens. Meaning the body must learn
how to fight these pathogens.
Antigen- Foreign substance on the pathogen that triggers the
Macrophages- “Patrol” your body and eat the pathogens.
If More help is needed then…
Helper T Cells- Trigger the production of B cells and Killer T
Lymphocytes- specialized white blood cells known as T cells
and B cells.
B Cells- Make antibodies
Antibodies- A protein that binds to antigens and inactivates it
or help the Macrophages eat the pathogen.
T Cells- recognize infected cells and kill the cell.
Suppressor T Cells- Turn off the helper T cells when the
infection is cleared.
“Patrol” your body and eat the pathogens. Macrophages
will invade and destroy any foreign substance as well
as old or weakened body cells or debris.
After digesting a pathogen the macrophage will present
the antigen to a Helper T Cell. Which down the road
will result in the production of Antibodies by B cells.
Trigger the production of B cells and Killer T cells. They
are extremely important to the immune system. People
with AIDS have a very low count of Helper T cells. You
could say they sound the alarm to trigger battle.
B cells make antibodies used to bind to a specific
Recognize the infected cells and kill them. Will also kill
their own kind so they must be stopped after the
Turn off helper T cells when the infection is cleared.
Memory Cells- Cells that “remember” the
antigens that have been fought off before
and how to fight them.
Active Immunity- immunity that is
developed from being exposed the actual
Passive Immunity- Temporary Immunity
that is received from the antibodies of
another animal or human.
Your _________ ________ is a network of cells,
tissues, organs, and chemicals that fight off
pathogens. There are ______ lines of defense
in your immune system. The first is _________
and __________ barriers. The second line of
defense is called The ___________ ______
_____ Inflammatory response
it is a reaction to tissue damage caused by
injury or infection. Each B cell is programmed
to make one type of _____________, or
protein that acts against a specific antigen.
Found in toxins and on the surface of
pathogens, ____________ are substances that
can trigger an immune response. T cells and B
cells are types of _____________.