Download The RESPIRATORY System

The IMMUNE System
Unit 3
Transportation Systems
Learning Log
• Why do we need the immune system?
• How often is it used?
Functions of the Immune System
• Provide immunity to the body by protecting
against disease.
• Identify and kill pathogens and tumor cells.
• Produces white blood cells and antibodies.
• Filters out organisms that cause disease.
Structures of the Immune System
Tonsils
• Lymphoid tissue located
on either side of the
throat.
• Destroy harmful
organisms that enter the
body through the mouth.
Lymph Nodes
• Filters or traps foreign
particles.
• Contain white blood
cells.
• Found throughout the
body in the neck,
armpit, chest,
abdomen, elbows,
groin, and knees.
White Blood Cells
• Protect against infection and disease.
• Produced in the bone marrow and move to
other parts of the body until they’re needed
to fight infection.
• Not released into the bloodstream until
they’re needed.
Diseases and
Disorders
• Human immunodeficiency Virus
(HIV)
• Lupus
• Mononucleosis
AIDS
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Acquired Immune Deficiency Syndrome
Contagious disease comprising the immune
system.
Caused by the human immunodeficiency virus
(HIV).
Capable of becoming multi drug-resistant.
AIDS is the final stage of the HIV infection.
Average incubation period for AIDS development is
10 years from point of infection.
Characterized by opportunistic infections.
There is no cure.
HIV Human Immunodeficiency Virus
• Affects T cells within the
immune system.
• Attacks the RNA of the
T cell.
• Causes the T cell to alter
its DNA to become HIV.
• When infected T cell
replicates, the T cell
creates more HIV.
• Death results in
opportunistic infections.
How AIDS & HIV Affect the Body
• Video
Lupus
• Chronic,
inflammatory,
autoimmune disorder
affecting many organ
systems.
• Body’s defenses are
turned against itself
and immune cells
attack healthy
tissues.
• Signs & Symptoms
– Fever
– Weight loss
– Sensitivity to sunlight
Mononucleosis
• Also known as the
kissing disease.
• Infectious
inflammatory disease
caused by the
Epstein-Barr virus.
• Most commonly
affects young adults
between the ages of
15 and 25.