Major salivary glands Flashcards
what are the major salivary glands (exocrine glands-compound acinar with excretory ducts)
What are the minor salivary glands (located in oral submucosa)
parotid gland
submandibular
sublingual
labial
buccal
lingual
palatine
What is each major salivary gland covered by
connective tissue capsule
The parenchyma of each consists of secretory units
on a branching duct system arranged in lobules, separated by
septa of connective tissue.
The secretion of each gland is either
serous, seromucous, or mucous, depending on its content of
the glycoprotein mucin.
What is it for each gland
Parotid: serous and watery
Submandibular/lingual: seromucous secretion
minor glands: mainly mucous secretion
What are the epithelial cell types of salivary glands
serous- round nuclei, well stained RER, apical secretory granules (zymogen?). Joined by tight/adherent junctions, small central lumen
Mucous- more columnar shape, basal nucleus, cylinderal tubules rather than acini, poorly stained
Myoepithelial cells- inside basal lamina surrounding acini+tubules. flattened cells with contractile processes helps move secretory products into and through ducts
Features of the major salivary glands
PAROTID: Branched acinar glands, ONLY serous cells-secrete alpha amylase.
Can find intercalated and straited ducts
SUBMANDIBULAR: Branched tubuloacinar glands, mainly serous acini but has mixed acini.
Mixed cells have demilunes made by serous cells
secretes alpha amylase and LYSOZYMES
SUBLINGUAL: Branched tubuloacinar glands, mainly mucois cells but has mixed
Mixed cells have demilunes of serous
Straited ducts almost never seen
