02_Practical_Glandular_epithelium

							Glandular epithelium
Gland
= Complex structure of epithelial tissue,
  connective tissue, blood vessels and nerve
  endings, specialized for secretion.

• Epithelial tissue – secretory function
• Connective tissue – supportive role.
            Types of glands
• Excretion of secretory product
- exocrine gland
- endocrine gland
              Classification
• Number of cells: - unicellular (goblet cell)
                   - multicellular
                 Goblet cells
- one cell – glands
- secret mucus
- PAS-positive
General structure of multicellular
         exocrine gland

• 1.Secretory portion



• 2.Excretory duct
             Classification
             secretory portion
• Shape of
             excretory duct
        Shape of secretory portion
• Acinar
• Alveolar
• Tubular
  – Coiled tubular
  – Branched tubular




simple: only one type
mixt: combined shapes
( tubuloalveolar)
           Excretory duct
• Simple             Compounds
• Simple tubular : Lieberkuhn gland
• Simple coiled tubular: sweat gland
•Simple branched tubular: gastric gland
Simple branched acinar : sebaceous
Simple branched tubuloacinar
• Compound tubuloalveolar: prostate gland
Compound acinar: parotids
               Acini
Mucous acini      Serous acini
Serous acini
Mucous acini
Mixed acini
              Endocrine glands
• Islet
• Cord
• Follicule