salivary acini presentation

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salivary acini presentation

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Slide 1:

Second Year Section 4 2009/2010

Mansoura University:

Mansoura University Faculty of Medicine Histology Department Second Year Section 4 2009/2010

Slide 3:

Salivary Acini

By Second year students Section (4) Group (c):

By Second year students Section (4) Group (c) Under supervision of Dr/Azza El-Hadidi Dr/Sanaa El-Sherbeni Dr/Ghalia Mahfouz

Salivary Gland:

Salivary Gland Second Year Section 4 2009/2010 Struct

What is the salivary gland?:

What is the salivary gland? Simple or compound branched tubuloalvealar gland Second Year Section 4 2009/2010

Types:

Types Major Submandibular Sublingual Parotid Minor Buccal Labial Palatine Lingual Second Year Section 4 2009/2010

Slide 8:

Second Year Section 4 2009/2010 Parotid Submandibular Gland Sublingual

Function:

Function Secretion of saliva Second Year Section 4 2009/2010

structure:

structure Second Year Section 4 2009/2010

stroma:

stroma 1- Connnective tissue 2- Trabeculae 3- Reticular fibers

Slide 12:

Parenchyma Secretory part (salivary acini) Transport system (branching ducts)

Slide 13:

Second Year Section 4 2009/2010

Slide 14:

Model of the gland: a bunch of grapes: berry= acinus stalk of berry: intercalated duct

Salivary Acini:

Salivary Acini Second Year Section 4 2009/2010

What is the salivary acini?:

What is the salivary acini? It the secretory part of salivary gland Second Year Section 4 2009/2010

Structure:

Structure The salivary acini 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

Classification :

Classification According to the nature of secretion There are 3 types : Mucous Serous mucoserous Second Year Section 4 2009/2010

Slide 19:

Second Year Section 4 2009/2010

Mucous acinus:

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

Slide 22:

Second Year Section 4 2009/2010

Slide 23:

Second Year Section 4 2009/2010

Slide 24:

Second Year Section 4 2009/2010 Basket cell

Slide 26:

Second Year Section 4 2009/2010

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Second Year Section 4 2009/2010

Slide 28:

Second Year Section 4 2009/2010

EM :

EM Cytoplasm contains: rER and mitochondria in the basal part Supranuclear golgi appartus Apical electron lucent mucous granules Second Year Section 4 2009/2010

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Electron lucent Granules

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Second Year Section 4 2009/2010

Serous acinus :

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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Second Year Section 4 2009/2010

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Second Year Section 4 2009/2010

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Second Year Section 4 2009/2010

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Second Year Section 4 2009/2010

EM:

EM Cytoplasm contains: Numerous rER and mitochondria in the around nucleus Supranuclear golgi appartus Apical electron dense secretory granules Second Year Section 4 2009/2010

Slide 39:

Electron dense Granules

Slide 40:

Why Crying?? Histology is Easy!!

Mucoserous acinus mixed acinus :

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

Slide 42:

Second Year Section 4 2009/2010

Slide 43:

Second Year Section 4 2009/2010 Mucous cell Crescent of gianuzzi Basket cell

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Second Year Section 4 2009/2010

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Second Year Section 4 2009/2010

Slide 47:

Second Year Section 4 2009/2010 Revision

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Second Year Section 4 2009/2010

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Second Year Section 4 2009/2010

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Second Year Section 4 2009/2010

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Second Year Section 4 2009/2010

Slide 53:

Important MCQ question ? ? ? ?

Slide 54:

1- Mucous acini 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

2- basket cells are :

2- basket cells are a) secretory cells b) Contractile cells C) endocrine cells D) connective tissue cells e) sensory receptor Answer b Second Year Section 4 2009/2010

3- serous acini are :

3- serous acini are 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

Slide 57:

Second Year Section 4 2009/2010 See you in another presentation

Slide 58:

Second Year Section 4 2009/2010 Bye,bye

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