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