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.
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5. Parotid Stroma is well developed Trabeculae (Septa) are thick & rich in adipocytes (A). Parenchyma: Mostly serous acini (S). S A
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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 .
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.
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)