Inflammation and Disorders of Growth Flashcards
Latin word that means to set fire
Inflammare
Universal response to tissue damage by wide range of harmful stimuli mechanical trauma, tissue necrosis and infection
Inflammation
Purpose of inflammation
- To destroy (or contain) the damaging agent
- To initiate repair processes
- To return the damaged tissue to useful function
Causes of inflammation:
- Living organisms
- Chemicals
- Mechanical and thermal injuries
- Immune reactions
Changes during inflammation:
- Blood vessel changes
- Changes in blood stream
- Changes in rate of flow
- Leukocytic emigration
- Diapedesis of RBCs
- Serum exudation
Changes of inflammation:
momentary contraction of the blood vessel
Blood vessel changes
vessels dilate causing more arterial blood
hyperemia
Changes of inflammation:
increased permeability of venules and capillaries
blood vessels changes
Changes of inflammation:
changes in erythrocyte distribution
Changes in blood stream
Mechanisms of leukocytes margination (pavement) is either:
a. WBCs gets adhesive
b. Capillary wall gets sticky (endothelium gets sticky)
Changes of inflammation:
Accelerate of the rate due to arteriolar dilation
Changes in rate of flow
Retardation of rate flow is due to:
- fluid loss leads to increased blood viscosity
- leukocyte stickiness
- stasis; exudation
Changes of inflammation:
ameboid movement of leukocytes towards the site of inflammation
leukocytic emigration
cause of leukocytic emigration
chemotractic forces
process of attraction of leukocytes to certain area that has the chemotactic substances
Chemotaxis
The action of neutrophils are
phagocytic
phagocytic power is shown toward
bacteria
large number of this are killed by bacterial toxins
neutrophils
production of pus
suppuration or purulent exudate
this produces pus
neutrophils
these cells present in the parasitic infection and hypersensitivity due to release of eosiniphils chemotactic factor from mast cells when intact with Ag+IgE to mast cells and release of histamine
Eosinophils
It is phagocytes cells inside the blood and when reach to the cells and tissue it will become macrophage cells or called histiocytes
monocytes
the function of this is to phagocytes foreign bodies
monocytes
they fuse to form multinucleated giant cells (langhan’s giant cell)
monocytes
it is similar to macrophage and similar to epithelial cells close to each other with no different borders between its cytoplasm and they tend to have small nucleus
Epithelioid cells
these cells are no phagocytic cells but release lysosomal enzyme
epithelioid cells
they form by fused the cytoplasm of the macrophages
giant cells
4 types of giant cells
- Langhan’s giant cell
- Foreign body giant cells
- Touton Giant cell
- Warthin-Finkeldy
Classification of inflammation according to time:
a. acute inflammation
b. subacute inflammation
c. chronic inflammation