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SALIVARY GLANDS AND PANCREAS
Dr Iram Tassaduq
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The minor salivary glands are located in the submucosa of different parts of the oral cavity.
They include the lingual, labial, buccal, molar and palatine glands.
MINOR SALIVARY GLANDS
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MAJOR SALIVARY GLANDS
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STRUCTURE OF GLAND
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MYOEPITHELIAL CELLS Contractile cells Lie between basal
plasma membrane of epithelial cells and basal lamina of epithelium
Move secretory product
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DUCT SYSTEM
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INTERCALATED DUCTIt leads from acinus
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STRIATED DUCT
Striations are produced due to in folding of basal plasma membranes of columnar cells forming duct
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INTERLOBULAR DUCT
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EXCRETORY DUCT
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DUCT SYSTEM
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OPENNING OF EXCRETORY DUCT
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SUBMANDIBULAR GLAND
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SUBLINGUAL GLAND
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COMPARISION
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PANCREAS
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PANCREASCompound tubulo alveolar gland
Striated ducts absentIntercalated duct cells do not contain secretory granules
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CAPSULE & SEPTA
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EXOCRINE PANCREAS
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CENTROACINAR CELLS
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CENTROACINAR CELLS
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DUCT SYSTEM
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ZYMOGEN GRANULES
Contain variety of digestive enzymes like exo and endopeptidases, Lipases and nucleolytic enzymes
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INTERCALATED DUCT
Add bicarbonate and water to the exocrine secretion
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EXCRETORY DUCT
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ENDOCRINE PANCREAS
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ISLETS OF LANGERHANS
Islets constitute 1-2% of total volume
Polyhedral cells are arranged in short irregular cords surrounded by network of fenestrated capillaries
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SCHEMATIC DRAWING
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CELLS OF ISLETS Most abundant in tail A cells secrete
Glucagon B cells secrete Insulin
most numerous D cells secrete
Somatostatin
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