2. Functions of the Immune SystemFunctions 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.
4. TonsilsTonsils
• Lymphoid tissue located
on either side of the
throat.
• Destroy harmful
organisms that enter the
body through the mouth.
5. Lymph NodesLymph Nodes
• Filters or traps foreign
particles.
• Contain white blood
cells.
• Found throughout the
body in the neck,
armpit, chest,
abdomen, elbows,
groin, and knees.
6. White Blood CellsWhite 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.
8. AIDSAIDS Acquired Immune Deficiency SyndromeAcquired 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.
9. HIVHIV Human Immunodeficiency VirusHuman 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.
10. How AIDS & HIV Affect the BodyHow AIDS & HIV Affect the Body
12. MononucleosisMononucleosis
• 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.
