salivary glands Flashcards
major salivary glands
- parotid
- submandibular
- sublingual
name of duct for parotid gland
stenson’s duct
name of duct for submandibular gland
wharton’s duct
all salivary glands develop from
oral epithelium
glands continue to grow until what age
2 years of age
salivary gland ductal system
- secretory end piece (acini)
- intralobular:
1. intercalated
2. striated - interlobular
3. excretory
4. interlobar
5. main duct
two types of acini
- serous
- mucous
serous acini
- nucleus is basal and round
- zymogen granules towards lumen (apical)
- intercellular canaliculi between cells
- microvilli
mucous acini
- CLEAR cytoplasm
- larger lumen
- may see serous demilunes
- secretion is high carb, low enzyme
- LACK CANALICULI (except demilunes)
myoepithelial cell
- contractile cells
- outside of acinar cell
- surrport acini during saliva secretion
- expel primary saliva into duct
- contraction in intercalated ducts (keeps patent, prevent backflow)
function of ductal cells
- move primary saliva
- modify (electrolytes, secrete proteins)
intercalated duct
- simple cuboidal
- myoepi at basal surface
- central nuc
- add lysozymes and lactoferrins
striated duct
- columnar
- central nuc
- pale cytoplasm
- surrounded by many elongated mito
- fn: reabsorb and secrete electrolytes
excretory ducts location
connective tissue septa between lobules
excretory ducts
- pseudostratified with columnar cells and few basal cells
- may see goblet cells
connective tissue
- separates glands from tissues
- divides gland into lobes and lobules
- n and v
saliva that reaches oral cavity is
hypotonic
secretion of macromolecules is regulated by
sympathetic nervous system
-triggers granule exocytosis
release of water is regulated by
parasympathetic nervous system
stress will trigger ____ nervous system and you get ____ water
triggers sympathetic, so you get less water
parotid gland
- PURELY SEROUS
- fat in interlobular ct increases with age
- saliva high in proteins
submandibular gland
- MIXED gland
- more serous than mucinous
- more striated, fewer intercalated
sublingual gland
- MIXED gland
- mucous > serous
- few striated ducts
minor salivary glands
- mucins, antibacterial proteins, and iGs
- NOT FOUND ON ANTERIOR HARD PALATE OR GINGIVA
- mostly mucous with serous demilunes
- tongue has von ebner glands
what type of gland is von ebner
purely serous
minor salivary glands are found
- palate
- tongue
- lip
- buccal mucosa
all minor salivary glands are mucous and serous, except for
palate *only mucous
