The major structures of the immune system include the spleen, tonsils, lymph vessels, lymph nodes, adenoids, and skin. The spleen recycles red blood cells and stores white blood cells, and fights bacteria causing pneumonia and meningitis. The tonsils are the first response of the immune system and contain M cells that can identify antigens from pathogens entering the mouth. Lymph vessels and lymph nodes filter lymph to prevent edema and control blood amount and pressure before lymph reenters the bloodstream. The adenoids trap inhaled or swallowed germs and are among the first responders to viruses and germs. The skin blocks some germs and keeps the body's temperature and water resistant.

1. Inmune System
Major Structures

2. Spleen
• The spleen Has two functions
in our body.The first is
recycling red blood cells and
storing white blood cells.The
second function is fighting
bacteria that causes
Pneumonia and Meningitis.
Tonsil
First response of the immune system.
Two structures behind the uvula. Are
the first to notice pathogens when they
enter you body through your mouth.
An cell in the tonsil called the M cell can
identify antigens from the pathogens.

3. Lymph vessels
• Filters the Lymph before
redirecting it to the blood
system. Prevents edema
neer the tissue. It keeps
the amount of blood and
preassuere controled
Lymph nodes
Mass of tissue that filters
lymph before it enters the
blood system. Controls
amount and pressure of
blood

4. Adenoids
• Tissue between tonsils
that traps inhaled or
swallowed germs. Also
one of the first to
respond to a virus or
germ.
skin
Used to block certain germs,
keep body temperature, and
be water resistant