Digestive Accessory Glands 2 Flashcards
What are all the accessory digestive glands
1) salivary glands
2) liver
3) gall bladder
4) pancreas
where are the minor salivary glands located?
throughout the submucosa of the oral cavity (including the lip)
3 pairs of major salivary glands
1) parotid
2) submandibular
3) sublingual
what is saliva comprised of?
►hypotonic solution containing water, mucin, amylase, lysozyme, ions
label
90% of saliva is made by the 3 major ducts (parotid, submandibular and lingual)
3 functions of saliva
1) moisten and cleanse the oral cavity
2) soften ingested food
3) dissolve ingested food and have basic carb digestion
2 types of salivary glands. What type of epithelium surrounds the acini and why?
mucuous and serous secretory cells. each acinus is associated with MYOEPITHELIAL CELLS which are contractile. Allows the glands to move the secretion into the duct.
what do serous salivary acini secrete?
watery secretions containing enzymes and antibodies.
sometimes, serous and mucous salivary acini are found together, with the serous cells forming a cap over the mucous cells, known as a ___ ___
serous demilune.
salivary acini empties into ducts made of ___ ___ called intercalated ducts. What do these ducts do? the intercalated ducts later lead to ___ ____.
SECRETORY CELLS. Intercalated ducts turn into striated ducts.
Intercalated ducts are made of secretory cells that secrete alkaline and Cl- ions into the saliva that is flowing through the duct (made by the acini).
what kind of epithelium lines the intercalated ducts. Are they longer in serous or mucus gland?
simple cuboidal epithelium. they are longer in serous and mixed glands, and short in mucus glands.
main antibody of saliva
secretory immunoglobin A (sIgA). produced by plasma cells occupying the connective tissue between the acini. these antibodies bind to receptors in the basal membranes of acinar cells, which endocytose them and subsequently release them into the saliva via their apical membrane.
what type of gland is the parotid gland? where does the duct open?
SEROUS gland therefore stains dark. opens close to the upper molar.
what kind of gland
parotid salivary
where is the submandibular gland? What kind of gland is it?
►Smaller than parotid. Lies in posterior floor of mouth
►Mostly serous with some mucous cells (MIXED)
►Are pure serous acini, pure mucous acini and mixed acini
►Duct opens into oral cavity on either side of lingual frenulum
what type of gland?
submandibular
https://library.med.utah.edu/WebPath/HISTHTML/NORMAL/NORM017.html
type of gland?
sublingual
what are the arrows pointing to?
serous demilunes ex/ in submandibular gland
