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Salivary acini
This document discusses the structure and function of salivary acini. It begins by defining salivary acini as the secretory part of the salivary gland, composed of a group of secretory cells surrounding a central lumen. It then describes the three main types of salivary acini: mucous acini, which contain pale foamy cytoplasm and apical mucous granules; serous acini, which contain dark staining pyramidal cells with apical zymogen granules; and mucoserous acini, which contain a mixture including serous cells arranged in crescents. Electron microscopy images show differences in organelles and secretory granules between the acini types.
Salivary acini
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- 2. By Second year StudentS Section(4) Group (c) Under supervision of dr/azza el-Hadidi dr/Sanaa el-SHerbeni dr/GHalia MaHfouz
- 3. Salivary Gland Second YearSection 4 2009/2010
- 4. What is thesalivary gland? Simple or compound branched tubuloalvealar gland Second Year Section 4 2009/2010
- 5. Types Major ♥ Submandibular ♥ Sublingual ♥Parotid Minor ♥ Buccal ♥ Labial ♥ Palatine ♥ Lingual Second Year Section 4 2009/2010
- 6. Second Year Section4 2009/2010
- 7. Function Secretion ofsaliva Second Year Section 4 2009/2010
- 8. structure Second Year Section4 2009/2010
- 9. StroMa 1- Connnective tissue 2-Trabeculae 3- Reticular fibers
- 10. parencHyMa 1.Secretory part(salivary acini) 2. Transport system (branching ducts)
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- 12. Model of thegland: a bunch of grapes: berry= acinusModel of the gland: a bunch of grapes: berry= acinus stalk of berry: intercalated ductstalk of berry: intercalated duct
- 13. Salivary Acini Second YearSection 4 2009/2010
- 14. What is thesalivary acini? It the secretory part of salivary gland Second Year Section 4 2009/2010
- 15. Structure The salivaryacini is composed of a group of secretory cells that surround a central lumen leading to the duct system. The acinus is surrounded by a basement membrane. There are branching myoepithelial cells, (basket cells) their contraction squeezes the secretions into the duct. Second Year Section 4 2009/2010
- 16. Classification According tothe nature of secretion There are 3 types: Mucous Serous mucoserous Second Year Section 4 2009/2010
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- 19. Mucous acinus LM Has wide lumen Surrounded by numerous basket cells Secretory cells are cuboidal with distinct boundries Nucleus is basal flat Cytoplasm is pale foamy Second Year Section 4 2009/2010
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- 22. Second Year Section4 2009/2010 Basket cellBasket cell
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- 27. EM Cytoplasm contains: rERand mitochondria in the basal part Supranuclear golgi appartus Apical electron lucent mucous granules Second Year Section 4 2009/2010
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- 30. Serous acinus LM Dark in staining Has narrow lumen Surrounded by less numerous basket cells Secretory cells are pyramidal with indistinct boundaries Central rounded nucleus Deep basophilic cytoplasm Apical acidophilic zymogen granules Second Year Section 4 2009/2010
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- 36. EM Cytoplasm contains: NumerousrER and mitochondria in the around nucleus Supranuclear golgi appartus Apical electron dense secretory granules Second Year Section 4 2009/2010
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- 39. Mucoserous acinus mixed acinus Is mainly mucous Surrounded by group of serous cells called serous demilune or crescent of gianuzzi Secretion of serous cells passes into canaliculi between mucos cells and lumen of the acinus Second Year Section 4 2009/2010
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- 41. Second Year Section4 2009/2010 Mucous cellMucous cell Crescent ofCrescent of gianuzzigianuzzi Basket cellBasket cell
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- 52. 1- Mucousacini are lined by cells having a) Apical zymogen granules b) Basal rounded nuclei c) Indistintinct lateral boundaries d) Ion transport activity e) Non of the above Answer e Second Year Section 4 2009/2010
- 53. 2- basket cellsare a) secretory cells b) Contractile cells C) endocrine cells D) connective tissue cells e) sensory receptor Answer b Second Year Section 4 2009/2010
- 54. 3- serous aciniare a) dark in staining b) surrounded by basket cells c) lined by pyramidal cells with apical zymogen granules d) all of the above e) non of the above Answer d Second Year Section 4 2009/2010
- 55. Second Year Section4 2009/2010 See you in See you in anotheranother presentation presentation
- 56. Second Year Section4 2009/2010