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Types of Acini in Salivary Glands 1)  Serous 2)  Mucous 3)  Mucoserous   Serous demilune Crescent of Gianuzzi
Myoepithelial Cells (Basket Cells) Stellate-shaped cells which embrace  acini  &  ducts  as an octopus.   Function ???
Duct System 1)  Intercalated ducts:   Simple cubical epithelium . 2)  Striated (Intralobular) ducts:   Cuboidal or low columnar cells with rounded nuclei. 3)  Interlobular (Excretory) ducts: Columnar cells.  4)  Interlobar ducts: Pseudostratified columnar. 5)  Main Duct:   Stratified Columnar then strtified squamous at its end.
 
Parotid Stroma is well developed Trabeculae (Septa) are thick & rich in adipocytes  (A). Parenchyma: Mostly serous acini  (S). S A
 
Intercalated Duct   (arrow) It extends from a secretory acinus  (S) Acini empty their secretions into these ducts, Lined with  Simple cubical epithelium . Have  acidophilic cytoplasm . S
S S S:   Serous Acini   A:   Intercalated Duct:  Simple Cubical B: Intralobular (Striated) Duct:  Low columnar cells.
Intralobular (Striated) Duct:   Arrow Low Columnar cells with rounded nuclei Cytopalsm is acidophilic with  basal acidophilic striations .
Interlobar (Excretory) Ducts Pseudostratified Columnar Epithelium 2: C.T. Septa
Submandibular Gland:  “ Human ” Seromucous Gland:   In humans,  90%  of its acini are  serous &  10%  are mucous and mucoserous. Main Duct:   Wharton´s Duct . Opens on the  sublingual papilla  at the side of the tongue on the floor of the mouth cavity.
Seromucous Gland
Submandibular Gland  “Dog” 1- Serous Secretory Unit 2- Mixed  ,,,,  ,,,,, 3- Intercalated Excretory Duct 4- Striated  ,,,,,  ,,,,, Mainly Mucous
Serous Demilunes from Submandibular Gland
 
 
Sublingual Salivary Gland Mucoserous  gland Mucous  acini predominate. Some mucoserous acini. NO  pure serous acini.
SD:  Serous demilune  N:  Nuclei of myoepithelial cells CT:  Connective tissue  MA:  Mucous acini L:  Lumen  Ns:  Nuclei of serous cells
Datashow Exam
Identify the type of acini. Mention their histological characteristics. (1)
(2)
(3)
* ,[object Object],[object Object],[object Object],(4)
[object Object],[object Object],(5)
[object Object],[object Object],(6)
a) Identify the type of acini   present in the field. b) What does the arrow point to? c) This gland is most probably ------------------------- (7)
[object Object],[object Object],[object Object],(8)
Stroma of Pancreas Trabeculae:  Thin, delicate, divide the gland into ill-distinct lobes and lobules.
Parenchyma:   (I)  Exocrine Portion:  Acini & Ducts.
Pancreas – Secretory acini w/ zymogen granules
Centroacinose Cells
(II) Endocrine Portion:   Islets of Langerhans
Pancreas – Secretory acini & Islet of Langerhans Lobule
DataShow Exam
a) What does the arrow & arrowhead point to? b) Identify the organ. (2)
a ) This is a mixed gland. Identify the exocrine & endocrine  Components. Mention the function of each. b) This gland is ------------------------------ (3)
(3)

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Salivary glands &pancreas

  • 1. Types of Acini in Salivary Glands 1) Serous 2) Mucous 3) Mucoserous Serous demilune Crescent of Gianuzzi
  • 2. Myoepithelial Cells (Basket Cells) Stellate-shaped cells which embrace acini & ducts as an octopus. Function ???
  • 3. Duct System 1) Intercalated ducts: Simple cubical epithelium . 2) Striated (Intralobular) ducts: Cuboidal or low columnar cells with rounded nuclei. 3) Interlobular (Excretory) ducts: Columnar cells. 4) Interlobar ducts: Pseudostratified columnar. 5) Main Duct: Stratified Columnar then strtified squamous at its end.
  • 4.  
  • 5. Parotid Stroma is well developed Trabeculae (Septa) are thick & rich in adipocytes (A). Parenchyma: Mostly serous acini (S). S A
  • 6.  
  • 7. Intercalated Duct (arrow) It extends from a secretory acinus (S) Acini empty their secretions into these ducts, Lined with Simple cubical epithelium . Have acidophilic cytoplasm . S
  • 8. S S S: Serous Acini A: Intercalated Duct: Simple Cubical B: Intralobular (Striated) Duct: Low columnar cells.
  • 9. Intralobular (Striated) Duct: Arrow Low Columnar cells with rounded nuclei Cytopalsm is acidophilic with basal acidophilic striations .
  • 10. Interlobar (Excretory) Ducts Pseudostratified Columnar Epithelium 2: C.T. Septa
  • 11. Submandibular Gland: “ Human ” Seromucous Gland: In humans, 90% of its acini are serous & 10% are mucous and mucoserous. Main Duct: Wharton´s Duct . Opens on the sublingual papilla at the side of the tongue on the floor of the mouth cavity.
  • 13. Submandibular Gland “Dog” 1- Serous Secretory Unit 2- Mixed ,,,, ,,,,, 3- Intercalated Excretory Duct 4- Striated ,,,,, ,,,,, Mainly Mucous
  • 14. Serous Demilunes from Submandibular Gland
  • 15.  
  • 16.  
  • 17. Sublingual Salivary Gland Mucoserous gland Mucous acini predominate. Some mucoserous acini. NO pure serous acini.
  • 18. SD: Serous demilune N: Nuclei of myoepithelial cells CT: Connective tissue MA: Mucous acini L: Lumen Ns: Nuclei of serous cells
  • 20. Identify the type of acini. Mention their histological characteristics. (1)
  • 21. (2)
  • 22. (3)
  • 23.
  • 24.
  • 25.
  • 26. a) Identify the type of acini present in the field. b) What does the arrow point to? c) This gland is most probably ------------------------- (7)
  • 27.
  • 28. Stroma of Pancreas Trabeculae: Thin, delicate, divide the gland into ill-distinct lobes and lobules.
  • 29. Parenchyma: (I) Exocrine Portion: Acini & Ducts.
  • 30. Pancreas – Secretory acini w/ zymogen granules
  • 32. (II) Endocrine Portion: Islets of Langerhans
  • 33. Pancreas – Secretory acini & Islet of Langerhans Lobule
  • 35. a) What does the arrow & arrowhead point to? b) Identify the organ. (2)
  • 36. a ) This is a mixed gland. Identify the exocrine & endocrine Components. Mention the function of each. b) This gland is ------------------------------ (3)
  • 37. (3)