Collagen fibers & Reticular fibers
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It is about fibers of Extracellular Matrix of Connective Tissues.
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Collagen fibers & Reticular fibers
- 1. Collagen Fibers Fawad Mueen Arbi Roll # 159
- 2. Introduction Most commonly occurring connective tissue fibers. Most abundant protein in mammals (25-35% of all proteins) Made up of collagen protein (Type I fibrils) These fibers are flexible but inelastic. Their diameter is 2-10 μm. Found in Cartilage, Bone, Tendon and Ligament
- 3. Structure In LM, it appears interwoven running randomly in all directions. When not under stress, they show wavy pattern In EM, it shows collagen fiber is further made of parallel fibrils which have diameter of 50-90 nm. The gap between two collagen molecules is called Lacunar Zone.
- 7. introduction Much thinner than collagen fibers with diameter of 0.5-2 m.μ Made up of collagen protein (Type III fibrils) It is visualized by Silver staining and PAS staining. Also called Argyrophilic Fibers. Present in Lymph Nodes, Spleen, Liver, Endocrine Glands, Bone Marrow, Endomysium and Endoneurium
- 8. production Bone Marrow and Lymph Nodes – Reticular Cells Liver, Spleen, Endocrine Glands – Fibroblasts Endoneurium – Schwann Cells GIT and Arteries – Smooth Muscle Cells