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20 Cards in this Set
- Front
- Back
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produce 10% of saliva
lip, cheek, palate (soft and hard), tongue, & floor of mouth secrete all the time |
The Intrinsic (Minor) Salivary Glands
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produce 90% of saliva
parotid (largest), submandibular, & sublingual (smallest) secrete more on a stimulatory bases |
The Extrinsic (Major) Salivary Glands
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capsule w/ supporting CT (primarily collagen fibers) septae that subdivides gland into lobes & lobules
septae contain nerves & blood vessels, connective tissue/supporting tissue of an organ |
stroma
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gland cells in acini
business end, secretory acini and duct system |
parenchyma
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What surrounds all parenchyma cells?
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myoepithelial cell
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– flat cell with flat nucleus found inside of the basement membrane at the periphery of all three types of acini
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myoepithelial cell
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What are the two systems of classification of salivary glands?
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location and function
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what are the 2 types of major (extrinsic) salivary glands
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interlobular, intralobular
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within acinar cell groups (intercalated & striated), within the lobual (small lobe, collection of parenchymal cells)
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intralobular
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within CT between parenchyma regions (excretory), larger than intralobular, rest in between the lobual
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interlobular
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what are the 3 types of salivary glands based on function
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intercalated, secretory/striated, excretory
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intralobular, smallest of the three, physically attached to the acinus, lined by simple cuboidal epithelium – can produce same product as acini
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intercalated
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simple columnar epithelium, intralobular, basal infoldings (mitochondria located here to provide energy) b/c active transport occurs here, balances electrolyte content (pH), also contains aldosterone receptors, larger than intercalated discs
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secretory/striated
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simple columnar, pseudostratified or stratified columnar epithelium (variable), interlobular, goblet cells are present, these dump into the main duct (duct of Stensen)
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excretory
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what do intercalated glands secrete
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lysozyme, lactoferrin
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Mumps are inflammation of the
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parotid gland
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major duct of the parotid gland
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– Stensen's duct –lined by stratified columnar epithelium
has all 3 types of ducts and is purely serous |
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major duct of the submandibular gland
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wharton's duct-joins sublingual duct
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what are the major ducts of the sublingual gland
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Ducts of Bartholin – main duct that joins Wharton’s duct and exits through sublingual caruncle, rest open at sublingual fold
– Duct of Rivinus – many smaller ducts that open into the sublingual folds |
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what is the chemical composition of saliva
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99% water
enzymes: amylase & lipase (start of digestion, carbohydrates and fat) electrolytes: Na+, HCO3-, & Cl- other: immunoglobin A (prevents clumping of bacteria), lactoferrin, lysozyme, epidermal growth factor, mucous |
