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Epithelium and Glands - Coggle Diagram

- - - - Keratenized
        dead cells on top,
        non nuclei, skin
      - Non-keratinzed
        surface cells living, moist surfaces
        oral, esophagus, anus, vagina
  - - - Bulging nucleus, fried egg look
      - Width >height
      - cavities, vessels, Henle, cochlea, alveoli, bowman's
    - - Cubes
      - NUCLEUS CENTERED!!
      - small ducts exocrine gland, thyroid, kidney tubules, germinal
        epithelium of ovary, choroid plexus of the brain
    - - height>width
      - nucleus oval, at midpoint or below
      - low to high
      - stomach, small and large intestine, gallbladder, uterus
  - - - Fusiform (intercalated)
      - Columnar
      - Basal
- - - - Zonula Adherens
        Belt Desmosome
        
        Belt-like
        
        Catherine & actin
        
        Below tight junction
      - Macula Adherens
        Spot Desmosome
        
        Just spots
        
        desmoglein/desmocollins, IF
    - - Direct passage of molecules
      - where adj cells need to coordinate
      - connexions--> connexions
    - - Forms a seal
      - Claudin/occludin & actin
      - Encircles the cell, defines polarity
- - - - Supported by stroma
      - Small secretory portions
        and ducts
      - Layers of connective tissue
        surround larger ducts in
        larger glands
      - Connective tissue capsule
        encloses the gland
      - Ducts
        
        Intralobular
        within lobule
        
        Intercalated
        from secretory unit
        
        Striated
        connects intercalated
        with interlobular
        Bigger opening
        surrounded by capillaries
        
        Interlobular
        between lobules
        tall simple columnar to pseudostrat
        surrounded by connective tissue
        
        Interlobar
        between lobes
        pseudostrat to strat cubo to strat column
        connect to main excretory duct
      - Lobe
        
        Lobule
        
        Acinar Cells
    - - Duct System
        
        Compound
        connected to epithelial surface
        by duct that branches
        
        Simple
        Connected to epithelial
        directly or by unbranched duct
      - Type of Secretion
        
        Mucous Cell
        viscous, fatty, clear, light
        nuclei flattened and preiphe
        Large granules
        
        Mixed
        both kinds
        
        Serous Cell
        watery, with prot and enzymes,
        translucent, stain a lot darker
        dark pink to light purple
        nucleus round, central
        granules
      - Cell Number
        
        Unicellular
        single, goblet cells
        secrete mucous
        
        Multicellular
        tubular or alveolar
        (acinar) secretory units
        with ducts
      - Method of Secretion
        
        Holocrine
        entire cell discharged
        viscous
        
        Apocrine
        product accumulates in
        apical portion and pinched off
        not too watery not too viscous
        
        Merocrine
        product secreted
        no loss of cytoplasm
        vesicle, exocytosis
        watery