GI Oral Histology Flashcards
the lip is a ______ junction between the integument and the Gi tract
mucucutaneous
the integument and mucosa are the same kind of cells, ______, but the difference is that _____
stratified squamous
the mucosa is not keratinized
the tongue is a ________, which means _________
muscular hydrostat
it is sort of like a water-filled cavity with muscle cells to help the tongue muscles move in their respective orders
the dorsal side of the tongue is _____ and the ventral surface is _____
keratinized and papillated
thin and not keratinized
what are the two different kinds of lingual papillae
mechanical function (without taste buds), which includes filiform, conical, and lenticular shapes
gustatory function (with taste buds)
fungiform, vallate, and foliate shaped
what is this
circumvallate papillae of the tongue
what is the lissa in carnivores?
a specialized structure in the tongue, it acts as supportive connective tissue
what is the function os the salivary glands?
produce saliva, serous and mucus, enzymes like amylase, and other proteins/hormones
what is this
serous salivary glands
what is this
mucous salivary glands
what is this? what is the significance of the structure of this tissue?
muco-serous salivay glands (hybrid)
the serous demilunes is an artifact of slide preparation where the mucus containing cells stay in the middle and the serous cells contract away and dehydrate, being pushed to the sides
intercalated ducts are _____, striated ducts are ______
cuboidal
cuboidal to columnar
why is a striated duct called striated?
due to the mitochondria and basal infoldings of the plasma membrane. the mitochondria need lots of sodium/potassium pumps and so there is a need for lots of surface area
what is the arrow pointing to?
an intercalated duct of a mixed salivary gland
what is this structure?
a striated duct in a mucus salivary gland
what is this structure and what causes the radial pattern?
a striated duct. the radial appearance is due to the basal infoldings to maximize surface area
what are these structures and how can you tell?
they are main salivary gland ducts. you can tell because there are several layers of cells/nuclei instead of just one which would be a striated duct
tooth enamel is mostly made of what?
hydroxyapatite
what are the two types of teeth?
brachydont and hypsodont
what cells produce enamel? what cells produce dentin?
ameloblasts
ondontoblasts
enamel is built for ____ and ____
hardness, toughness
can cementum regernate?
yes, cementoblasts are present throughout life to regenerate it
unlike dentin and enamel, cementum can contain _____
some trapped cells in lacunae
