PATHOPHYSIOLOGY :
Immunity
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1. Function of the To protect the body from invasion of foreign antigens, to identify and destroy
immune system potentially harmful cells and to remove cellular debris.
2. Immunity Body's natural or induced response to infection and its related condition.
3. Immunocompe- Immune system that identifies antigens and effectively destroys them
tent
4. Antigen Foreign substances that trigger the immune response.
Proteins found on the cell membrane or cell wall of microorganisms or tissues,
blood cells, pollen, egg white, animal dander, and insect or snake venom.
5. Immune System Defends and protects the body from infection.
Removes and destroys damaged cells.
Identifies and destroys malignant cells,thereby preventing their further develop-
ment into tumors.
6. Items that acti- External agents such as microorganisms; minor injuries such as small laceration or
vate the immune bruises.
system : Major injuries such as burns, surgeries, and systemic diseases like pneumonia.
7. Non specific Re- 1.Prevent or limit the entry of invaders into the body thereby limiting the extent of
sponses tissue damage and reducing the workload of the immune system.
2. Inflammation is an example.
8. Immune Re- When the inflammatory process is unable to destroy invading organisms or toxic
sponse this is activated.
9. Leukocytes 1.Primary cells involved in both non specific and specific immune system respons-
es.
2. Mobile units of the immune system, leukocytes detect, attack, and destroy
anything that is recognized as foreign.
3. They are able to move through tissue spaces, where they locate damaged
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