際際滷

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CONNECTIVE TISSUE
Connective tissue fibers
1.Collagen fibers
2.Reticular fibers
3.Elastic fibers
2Dr.M.Attia
CONNECTIVE TISSUE
Collagen fibers
Most abundant in the body
Insoluble fibrous protein, forms the major
component of the extracellular matrix.
3Dr.M.Attia
Collagen fibers
CONNECTIVE TISSUE
Colorless in fresh state
Very strong, flexible, inelastic with great
resistance to tension
Affected by weak acids and alkalies.
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Collagen fibers
LM:
Stains:
H&E: ACIDOPHILIC
Mallorys trichrome: blue
Van giesson trichrome: green
SHAPE
Long, wavy , unbranched fibers and present in bundles
CONNECTIVE TISSUE
5Dr.M.Attia
CONNECTIVE TISSUE
EM:
Collagen fibers
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CONNECTIVE TISSUE
Collagen fibers
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CONNECTIVE TISSUE
Collagen fibers
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CONNECTIVE TISSUE
Collagen fibers
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CONNECTIVE TISSUE
Reticular fibers
It is very thin
They are in network like shape around the cells
Recently, it is recognized as aspecial form of collagen fibers
type 3.
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CONNECTIVE TISSUE
Reticular fibers
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CONNECTIVE TISSUE
Reticular fibers
Site
Stroma of the organs
Smooth muscles
Endoneurium
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CONNECTIVE TISSUE
Highly elastic and stretchable in response to tension
Colorless in fresh state
Appear yellow in colour
They are stronge but less than collagen fibers
They are not affected by acids, alkalies, boiling
Destroy by elastase enzyme.
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CONNECTIVE TISSUE
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CONNECTIVE TISSUE
Site
 Lung, skin, Urinary bladder
 Wall of the large arteries like Aorta
 Elastic ligaments like : ligamentum flavum,
ligamntum nuchae
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16Dr.M.Attia

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