1. Immune System Disorders
Objective 8

2. Disorders
Our immune system is our primary line of defense against invading organisms
What happens if the immune system doesn’t work right?
Immune Deficiencies (disorders) include:
Allergies
Autoimmune diseases
Immunodeficiency diseases

3. Allergies
Allergies are when your immune system thinks harmless invaders (dust, pollen, pet hair) are dangerous
The immune system turns on to battle the invading particles
Inflammatory Response
Coughing, sneezing, runny nose, watery eyes, etc.

4. Asthma Asthma is an extreme allergy
The air passageways in the lungs swell, decreasing air flow
If not treated, it can be deadly
Triggered by allergies, exercise, stress, smoke, etc.

5. Autoimmune Diseases
The immune system functions by identifying invading particles
What if the immune system couldn’t tell the difference between your cells and invading cells?
Autoimmune disorders are when your immune system attacks your own cells
Diabetes type I
Multiple sclerosis

6. Immunodeficiency Disease
Immunodeficiency = weak immune system
Sometimes the immune system fails to develop properly
AIDS can also cause an immunodeficiency

7. AIDS Caused by HIV (human immunodeficiency virus)
HIV attacks your helper T cells, breaking down your immune system’s ability to react to invaders
Transmission:
STD
Blood transfers
Mother to child
No cure… yet