1. INFLAMMATION What is inflammation?
it’s a body response against ( MILD or MODERATE) injury , it’s a first line of defense.
Not severe enough to cause cell death (necrosis).

2. Inflammation is of two types:
1- acute : sudden onset 2- chronic : gradually 3-sub-acute: something between the acute and chronic.

3. Aim of inflammation: 1- remove and destroy the irritant.
2- prevent further spreading of the irritant.
This irritant may be:
1- living : bacteria, viruses, parasites or fungi.
2- non-living: mechanical: shock, accident
Chemical, immunological.

4. 1- chronic inflammatory cells

5. 2- chronic inflammatory cells

6. 3- chronic inflammatory cells:

7. 4- Giant cell ( langerhan’s) specific :

8. 5- Giant cell (foreign body) non-specific:

9. 6- foreign body:

10. 7- Acute inflammatory cells:

11. Mechanism of inflammation:
1- Vascular changes
2- Leukocytes “cellular” events
3- Chemical mediators of inflammation

12. 8- Margination of WBC’s:

13. 9- Immigration of WBC’s

14. 10- inflammatory reaction “dilated blood vessels”