By Salehe Sekandari
Connective tissueConnective tissue, as the name implies,
forms a continuum with epithelial tissue ,muscle, and nervous tissue to
maintain a functionally integrated body.
Unlike cells of Epithelial tissue, connective tissue cells are not directly attached to one another.
Connective tissue consists of individual cells scattered within an extracellular matrix.
Major Functions of Connective TissueConnection of body tissuesProtection of organsStorage of energyDiffusion of metabolitesDefenceCell growth and differentiationWound healing
Connective tissue elementsCellsFibersGround substance
Extracellular matrix
cellsFibroblasts (which secrete the fibers and
ground substance of the extracellular matrix).Macrophages (which ingest and remove
foreign material or damaged cells). Plasma cells(Which derived from B
lymphocytes and manufacture antibodies. Adipocytes (which store fat). Mast cells (which trigger inflammation).Mesenchymal cells
lymphocytes, Eosinophils, and neutrophils
FIBROBLAST VS FIBROCYTE
Collagen Fibers
Elastic Fibers
Reticular Fibers
Elastic
Collagen
Ground substance Components: Glycosaminoglycans
dermatan sulfate, keratan sulfate, Heparan sulphate, chondroitin sulfate, hyaluronic acid
Glycoproteins Laminin, Fibronectin, Chondronectin,
Osteonectin
Tissue Fluid
Connective Tissue:a-Loose CT b-Dense(regular & Irregular) CTC-Mucous CTD-Mesenchymal CTE-Reticular CTF-Adipose CT(unilocular(white) &
Multilocular(brown))G-Elastic CTH-CartilageI-BoneJ-BloodK-Lymph
Loose connective tissueLoose connective tissueLoose
arrangement of fibers and cells in abundant ground substance
Underlies all epithelia, between muscles, passageways for nerves and blood vessels
5-13
Dense Irregular Connective TissueDense Irregular Connective Tissue
Densely packed, randomly arranged, collagen fibers and few visible cells reticular layer of derm; capsules around organs
5-14
Dense Regular Connective TissueDense Regular Connective Tissue
Densely, packed, parallel collagen fibers compressed fibrobalast nuclei
Tendons and ligaments hold bones together and attach muscles to bones
5-15
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Wh
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1. Hyaline cartilage2. Elastic cartilage
3. Fibrocartilage
Hya
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Hya
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Compact Bone
Spongy Bone
Sp
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Bo
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Sp
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Bo
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Co
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Bo
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Co
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Bo
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Histology of Bone Tissue
Co
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Bo
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Co
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Bo
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(Dec
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)(D
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Compact BoneCompact BoneGround sectionGround section
(Canal of volkman)
Compact BoneCompact BoneGround sectionGround section
Thanks for your attention!