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Glandular epithelium (Endocrine glands (Solid cords, Follicles,, Fascicles…

- - - - Simple gland
        
        are with single non-branched duct
      - Compound gland
        
        are those with a branched duct.
    - - Tubular glands
        
        (the secretory cells are arranged as tube surrounding straight tubular lumen)*
      - Acinar glands*
        
        (the secretory cells form rounded structure surrounding a central lumen).
      - Mixed tubuloacinar glands
    - - may also be coiled or branched.
  - - - formed of one glandular cell; e.g., goblet cell.
    - - formed of numerous cells; e.g., salivary glands.*
  - - - the most common form of secretion, the secretion is discharged by exocytosis & the cell membrane is remain intact after the secretion is completed. (e.g. salivary gland).
    - - the secretion is accumulated in the apex of the cell then pinched off tacking with it some of the apical cytoplasm (e.g. mammary glands).
    - - involves disintegration of the cells to release the secretory product (e.g. sebaceous glands).