Salivary gland Structure Flashcards
what are the secretary end pieces called
acini
- grape like
what surrounds the acini and ducts
connective tissue
what is the ben strut of saliva gland
duct
acinus - sec end piece
where is saliva made
sec end piece
end of duct
what are the diff types of ducts
acinus
interrelated
striated
secretory
what is the acinus
production of saliva
push saliva into lumen common with interlaced duct
what is the intercalated duct
connection between acinus and the striated duct
what is the straietd duct
where modification takes place of the saliva
what is the secretary duct
the final destination of saliva before secreted into the mouht
what are the two forms of structural units of salivary glans
epi and connective tissue
what are the epithelial constituents of the salivary gland
sec end piece - acini
ducts
myoepithelial cells (on acini and ducts)
what are the connective tissue constituents of the salivary glands
capsule
septa
surround all epi units
carries blood and nerve supply
what is the CT capsule
fibrous estruture holding together
what is th CT septa
divides gland into lobes and lobules
what are myoepithlial cells
specialise CT cells contractile
what are the lobes
largest units sep by thick septa
what are the lobules
smaller units
sep by thin septa
contain intercalated and started ducts
what kind of solution s formed in the acinus
isotonic fluid
what happens to the fluid in the strayed duct
modified an becomes hypotonic fluid
what is the parotid sec and where
serous >95%
upper first mola
what is the submandibular sec and where
mix/main serous 60%
long duct
across mylohyoid and under tongue frenulum
what is the sublingual sec and where
mix/main mucous 75%
excretory duct under tongue frenulum
how does minor salivary glands differ from major
smaller and shorter ducts
what secretion form minor glands
mucous
where are minor glands
labial
buccal
palatal
lingual
wha are the lingual (minor) glands
posterior mucous glands
anterior muçus gland
Serous glands of von ebner
posterior mucous gland
- location
- purpose
- back tongue behind sulcus terminals
- coat back tongue aid bolus
- protective
- good seal
what is the location and purpose of serous glands of von ebner
-next to circus valuate papillae assc in crypts to wash out fattty depo
in front of sulcus terminals
prevent fatty build up on tongue
what does the serous secretion of the glands of von ebner contain
lipase – fat breakdown
what is the location nd purpose of anterior mucous glands
below tip tongue
prod sticky sec
lines tongue to protect and lubricate
what si the innervation of the salivary glands
dual supply
both parasymp and simp
what are the two assc nerves for parasymp inv to salivary glands
facial and glossopharyngeal
explain the pathway of the facial nerve
sup salivary nuc (medulla)
1 - greater petrosal, sphenopalatine ganglion to palatal glands
2 - chords tympani, submandibular ganglion to submandibular, sublingual, lingual and labial glands
explain the pathway of glossopharyngeal
inferior salivary nuc to lesser petrosal to otic ganglion to parotid gland
what gives the sympathetic innervation
upper thoracic spinal nerves
what si the pathway for the symp
lateral horn simp chain sup cevrvical ganglion trigeminal branches blood vessels salivar glands
what does innervation of the acini lead to
inc active pumping of ions
inc exocytosis of formed elements
what does innervation to ducts to
inc active pumping of ions
what does innervation to myoepithelial cells fro
contrcation
what does innervation of blood vessels do
vasodilation - para
vasocons - symp
when does the development of the parotid gland begin
6 wek i.u.l
what are the epithelial origins of salivary glands
parotid and minor - ectoderm
submand, subling - either or end or ectoderm
lingual glands - endoderm
what is the developmental origin of CT
ectomesenchyem
mesoderm
what is the interaction for dev of salivary glands
epithelial - mesenchymal intercations
what does cellular diffenretiation depend on
epi - mesenchyme interactions
nerves - symp
overall growth is parasymp
