What portion of the tongue is tightly packed striated muscle bundles, with a little adipose tissue?
anterior 2/3
which portion of the tongue is bulkier, less mobile, and less adipose tissue?
posterior 1/3
What 2 types of mucosa are found on the dorsum of the tongue? And what parts do they make up?
masticatory: covers muscle tissue
specialized: tongue papilla
What are 3 types of taste bud cells?
fungiform papilla
foliate papilla
circumvallate papilla
true or false. taste buds contain taste pores
true
What is the most common papilla found on the tongue?
filiform
is filiform papilla a type of taste bud?
no
Where is filiform papilla located?
on the dorsal surface of the tongue
Where do the filiform papilla point?
toward the pharynx
how big are filiform papilla?
2-3 mm
What type of texture does filiform papilla have?
velvety
What causes the white color of filiform papilla?
increased keratin
What is the function of the filiform papilla?
to guide food back into the pharynx
Where is fungiform papilla located in the mouth?
body of dorsum of tongue - not near sulcus terminalis
What is the shape of fungiform papilla?
mushroom
What is the size of fungiform papilla?
1 mm
Why is fungiform papilla so red?
because it is highly vascularized
what is the function of the fungiform papilla?
taste
Where is foliate papilla located?
posterior lateral portion of tongue
What is the appearance of foliate papilla?
4-11 vertical ridges
what is the shape of foliate papilla?
leaf shaped
what is the function of the foliate papilla?
taste
How many circumvalate papilla?
7-15
What is the size of circumvalate papilla?
3-5 mm
Where is the circumvallate papilla?
just anterior to sulcus terminalis, inverted V facing pharynx
What is the shape of the circumvallate papilla?
raised mushroom shape
What is the function of circumvallate papilla?
taste
Where is von ebner's salivary gland found?
in the circumvallate papilla
sore or burning tongue, looks red to paler pink with white patches on the dorsal surface of the tongue, caused by changes in filiform papilla (goes from parakeratinized to orthokeratinized)
geographic tongue
thick layer of dead cells and keratin extrinsically stained by tobacco, medicines, and chromogenic bacteria, caused when mormal shedding of epithelium of the filiform papilla does not occur, it is the effect of fungal overgrowth due to high doses of antibiotics or radiation on the dorsal surface of the tongue
