digestive system pt 1 Flashcards
what type of epithelium is found on filiform papillae?
keratinized stratified squamous
what type of epithelium is found on all other papillae?
stratified squamous
von ebner glands are found with _____ tongue papillae
vallate
taste buds are not found on which tongue papillae?
filiform
what do the intrinsic tongue muscles do?
change shape of tongue
what is the oral cavity lined with?
oral mucosa
what are the 3 types of oral mucosa?
Masticatory
Lining
Specialized
where is the masticatory mucosa found?
on gingiva and hard palate
what is the surface epithelium of the masticatory mucosa?
keratinized or parakeratinized stratified squamous epithelium
superficial cells of parakeratinized stratified squamous epithelium keep what?
their nuclei
the lamina propria of the masticatory mucosa has what 2 layers?
papillary- thick loose ct
reticular- more dense ct
where is the lining mucosa of the oral mucosa found?
soft palate, underside of tongue, floor of mouth, cheeks and lips
what is the surface epithelium of the lining mucosa of the oral mucosa?
mostly- nonkeratinized stratified squamous epi.
occasional- parakeratinized stratified squamous epi.
what is the surface epithelium of the lips, vermillion border?
keratinized stratified squamous epi.
what areas of stratified squamous epi. are typically thicker?
nonkeratinized are thicker than keratinized
the lamina propria of the lining mucosa is made up of?
loose ct with blood vessels and nerves
the submucosa of the lining mucosa is made up of?
more dense ct
where is the specialized oral mucosa found?
on the dorsal surface of the tongue
what is the surface epithelium on the filiform papillae?
keratinized stratified squamous
what is the surface epithelium on all other papillae?
stratified squamous
what are the 2 functions of the specialized oral mucosa?
move food
taste
what is the mucosa of the tongue like?
thicker dorsally, thinner and smoother posteriorly
what is the function of the von ebner glands of the tongue?
produce serous fluid to cleanse the tastebuds
what is the lamina propria of the tongue made up of?
loose ct; adipose possible
what type of glands do the submucosa contain?
lingual salivary glands
what are the 4 intrinsic muscles of the tongue from superior to inferior?
superior longitudinal
vertical alternating with transverse
inferior longitudinal
what is the function of the intrinsic muscles of the tongue?
change shape of tongue (phonation and moving food)
layers of teeth from outside to inside
ameloblasts enamel dentin predentin odontoblast dental papilla
what is the function of ameloblasts?
produce enamel
what is the hardest substance in the body?
enamel
what is enamel made of?
interlinked enamel rods
what type of cells are ameloblasts?
polarized columnar
what is the thickness of enamel?
2 mm thick
what can’t we make more of after a tooth eruption?
enamel
what is the precursor to dentin before mineralization?
predentin
which cells are produced by odontoblasts?
dentin
what are the columnar cells lining the pulp cavity?
odontoblasts
unlike ameloblasts, ondontoblasts survive in?
adults
what is the function of odontoblasts?
repair and produce dentin
what is dental papilla made of?
CT with many blood vessels and nerves
which cells produce dentin?
odontoblasts
which cells produce enamel?
ameloblasts
which teeth cells will persist in adults?
odontoblasts
enamel is produced by which type of cell?
ameloblasts
named the area of CT beneath the odontoblasts?
dental pulp
which cell type will maintain dentin?
ondontoblasts
