Lymphatic & Immune System
System Interactions
Lymphatic Function: (works with immune
system)
 Helps protect body from disease
 Collects fluid lost from blood vessels
and returns fluid to circulatory
system
Parts:
 WBC, thymus, spleen, lymph nodes,
lymph vessels
Fluid is known as lymph
 Thymus produces T cells that
recognize invaders
 Spleen – helps cleanse blood and
remove damaged blood vessels
 Lymph nodes act as filters, trapping
bacteria and other organisms that
cause disease
How does system maintain homeostasis?
Immune Function: (works with lymphatic
system)
 To fight infection through the
production of cells that inactivate
foreign substances
Parts:
 White blood cells, thymus, spleen,
lymph nodes, lymph vessels
Pathogens are disease-causing agents, which
include
bacteria, viruses, fungi and environmental
factors
Nonspecific defenses
 First line of defense: skin, mucus,
sweat, tears
 Second line of defense: inflammatory
response
which is caused by tissue damage caused by
injury or infection
Specific defenses or immune response is
caused by an antigen or disease-causing agent
Antibodies are proteins that recognize and
bind to antigens and are released by plasma
cells
Vaccination – weakened or mild form of a
pathogen to produce immunity
Allergic reaction - overreaction of immune
system
to an antigen
 Histamine – increase blood flow and fluids to
surrounding area