Salivary gland structure Flashcards
name this part of the salivary gland
secretory ducts
name this part of the salivary gland
striated ducts
name this part of the salivary gland
intercalated ducts
name this part of the salivary gland
acini
use this diagram to describe the root saliva takes through a salivary gland
Salivary secretion starts in the acini located which produce the primary salivary secretion.
Secretion travels along small simple ducts call intercalated ducts.
Feed into a larger duct network called striated ducts which modify the saliva.
Then secretory ducts which get bigger as they travel towards the mouth
name this structure
acinus
name this structure
intercalated duct
name this structure
striated duct
name this structure
secretory duct
describe the structure of an acinus
pyramidal cells with a central lumen
the cells are polarised - peripheral nucleus
what does the acinus do?
produce primary salivary secretion
what types of secretion to acini produce?
serous and mucous secretions
what type of secretion does parotid gland produce?
serous
what type of secretion does the submandibular gland produce?
mixed
serous and mucous
what type of secretion does the sublingual gland produce?
mucous
name this acinus
serous acinus
name this acinus
mucous acinus
as squashed basal nuclei
name this acinus
mucous acinus and serous demilune
mucous acinus with serous cells attached
describe a serous acinar cell
prominent nuclei in basal
basophilic RER - gives dark purple colour
granular appearance
describe a mucous acinar cell
why are mucous acinar cells pale?
as lots of granules make up most of the cell which contains mucin which is either lost during preparation or not easily stained.
these granules also flatten the nucleus
name these blue cells
myoepithelial cells
where are myoepithelial cells located in the salivary gland?
on the acini and intercalated ducts
what is the function of myoepithelial cells?
have contractile elements to regulate duct lumen diameter
squeeze the saliva out of the acinus and into the intercalated ducts
what are the shape of intercalated duct cells?
cuboidal
describe the nucleus in intercalated duct cells
large central nucleus
what is the function of intercalated ducts?
Passive tubes for saliva transport
which salivary gland structure is not present in sublingual gland?
striated ducts
describe the shape of striated duct cells
large cells with a folder basal membrane
describe the nucleus of striated duct cells?
central - due to the basal membrane folds so it cant get any more basal (actually basal)
how does the structure of striated duct cells relate to its function?
folded basal membrane to increase surface area for exchange on substances allowing it to modify saliva
describe the lumen of secretory (collective) ducts
large lumen
describe the arrangement of cells in secretory (collective) ducts as they get closer to the mouth
initially pseudostratified
then becomes stratified so it can merge with stratified squamous oral epithelium
