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Connective Tissue (C.T cell (Fixed (Resident) Cells (Endothelial cell (LM,…

- - - - EM
        
        Heterochromatic nucleus
        
        Cytoplasm contains G.A, rER and mitochondria
      - Function
        
        Forms the stroma of organs
        
        Reticular cells are fibroblasts that synthesize reticular cells
      - LM
        
        Nucleus: rounded with prominent nucleolus
        
        Shape: Stellate cell with long and thin cytoplasmic processes
        
        Cytoplasm: Pale basophilic
    - - Also called simple squamous epithelium > thin layer that lines the anterior surface of cvs and lymphatic systems.
      - EM
        
        Cytoplasm has few organelles
      - LM
        
        Nucleus: Flat
        
        Cytoplasm: thin
        
        Shape: Flat
      - Function
        
        Lines circulatory system
        
        Produce type IV COLLAGEN
        
        Facilitate exchange of substances across capillary wall
    - - LM
        
        Nucleus: deep basophilic
        
        Shape: Small fusiform with few processes
        
        Cytoplasm: Acidophilic
      - EM
        
        The cytoplasm contains few organelles
      - Inactive form of fibroblasts
      - Function
        
        Participate tissue repair and may revert to fibroblast
        
        Myofibroblasts is a modified fibroblast which have actin filaments (فيها أكتين عشان شبه ال smooth muscle شوية). They are abundant in wound healing.
    - - LM
        
        Nucleus: Active, ovoid and pale-staining
        
        Cytoplasm: basophilic >> rER
        
        Shape: Elongated, fusiform or stellate cell with long slender cytoplasmic process
      - EM
        
        Nucleus: euchromatic : with prominent nucleolus
        
        Cytoplasm: Contains organelles > dominant protein secreting ex: G.A and rER
      - Predominant (Principal Cells) in C.T أكتر خلية موجودة
      - Function
        
        Synthesize, secrete and maintains the components of extracellular matrix
        
        Essential for growth and repairing C.T
    - - EM
        
        The cytoplasm contains G.A, rER, Mitochondria, polyribosomes
      - LM
        
        Nucleus: Large rounded with prominent nucleolus
        
        Shape: Small cell with thin, long cytoplasmic processes.
        
        Cytoplasm: Pale basophilic
      - Function
        
        Stem cells of most C.T >> Present in bone marrow in adults
        
        Useful in regenerative medicine