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Salivary glands &pancreas

Salivary glands &pancreas






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    Salivary glands &pancreas Salivary glands &pancreas Presentation Transcript

    • 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)
    • *
      • Identify the arrows: red, black and yellow.
      • b) Identify astreix.
      • c) What is this gland suggested to be?
      • Identify the arrows: yellow, white & red.
      • b) This gland is ---------------------------
      • Identify the numbers: 1, 2, 3, 4, & 5.
      • b) This gland is most probably ---------------------
    • a) Identify the type of acini present in the field. b) What does the arrow point to? c) This gland is most probably ------------------------- (7)
      • What are the type of acini present in the field?
      • b) Identify the arrows: black, blue & red.
      • c) This gland is probably is ----------------------------
    • 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)