oral cavity histo Flashcards
1
Q
what makes up epithelial membrane
A
epithelial tissue with an underlying connective tissue layer
2
Q
types of epithelial membranes
A
cutaneous
mucous
serous
3
Q
what type of membrane is found in the oral part
A
mucous membrane
4
Q
what makes up the oral cavity
A
lips, vestible, oral cavity proper
5
Q
priciple function of oral cavity
A
physical breakdown of food
mix of saliva with bolus of food
begin breakdown of carbs with enzymes
6
Q
what are tonsils associated with
A
pharynx, root of tongue
7
Q
where is orbicularis oris muscle
A
in the lips
8
Q
where the muco-cutanenous junction occures
A
at the vermilion border
9
Q
what is the vermilion border a product of:
A
closeness of the facial artery to the lips
10
Q
opening to the mouth
A
oral fissure
11
Q
oral cavity proper space
A
behind teeth
12
Q
where is the vermilion border
A
at the apex of the lip
13
Q
epithelial thickness in and out of lips
A
inner: thin
outer: thick
14
Q
what gives the red line as we transition from skin to the lips
A
subcutaneous papilla
15
Q
hair follicules are found on what part of lip
A
external, cutanous part
16
Q
why vascularization can come so close to the surface of the lips
A
the subcutaneous papilla
17
Q
epithelium of the oral mucosa (lining epithelium( and layers
A
thick, stratified squamous epithelium stratum basale stratum spinosum stratum superficiale -like the tongue
18
Q
sweat glands in the oral mucosa
A
no
19
Q
what sensation element is found in the oral mucosa
A
meisners corpusles
20
Q
oral cavity epithelium is found
A
covering soft palate, lips, cheeks, bottom of tongue, floor of mouth, part of lining mucosa
21
Q
discription of parakeratinized epiethelium
A
has nucleous
but does not stain eosinophilic
22
Q
where is parakeratinized epithelium(masticatory mucosa) found
A
hard palate
dorsum of tongue
gingiva
23
Q
what makes up the tongue
A
muscle with a mucus membrane over it
24
Q
what covers posterior of tongue
A
lingual tonsils
25
the first arch of the mouth
palatal glossal fold
26
what is behind the paatal glossal arch
palatine tonsil
27
types of papillae on tongue
```
filiform papilla( all over)
Fungiform papilla(scattered on dorsum)
circumvallate papilla (v shape between anterior and post 1/3 of tongue
foliate papilae (youth only at side)
```
28
what papilla have taste buds
fungiform
29
devides anterior(2/3) and posterior(1/3) of tongue
sulcus terminalis (behind circumvallate papillae)
30
extrinic muscles of tongue roll
mount outside the tongue and move tongue in different directions
31
roll of intrinsic muscle of the tongue
change shape
32
the mid portion of the sulcus terminalis
foramen cecum(remnant of the thyroglossal duct)
33
smallest and most numerous papilae
filliform papilla
34
shape and make up of fillaform papilla
conicle with elongations at apex, covered with keratinized(lots) stratified squamous epithelium
35
roll of fillaform papilla
lick and move food (bent toward the pharynx
36
why fungiform papilla red
connective tissue comes really close to the surface(brings vasculature)
37
shape of fungiform
mushroom and round
38
what is found on the follate papilla
long ridges, with deep mucosal clefts, with numerous taste buds on the walls of the cleft
39
epithelium of follate papilla
nonkeratinzed stratified squamous epithelium
40
epithelium of fungiform papilla
lightly keratinized stratified squamous epithelium
41
shape and number of vallate papilla
dome shape (7-11)
42
taste buds location of vallate papilla
on the lateral walls
43
what empties into the "mote" of the vallate papilla
von ebner glands(lingual salivary glands)
44
roll of von ebner glands
release lots of saliva so taste buds can change rapidly with changing stimuli
45
epithelium of the vallate papilla
slightly keratinized stratified squamous epithelium
46
what type of receptor is taste bud
sensory receptor organ/chemorecetor
47
what makes up a taste bud
neuroepithelial cell-sensory
supporting cells
basal cells
48
neuroepthial cells of taste bud extends wear
through the epithelium
49
at the surface/apex of the taste bud, what is found
taste pore with a taste hair
50
what is the taste hair
a long microvillis that extends through the taste pore into the saliva where it is percieved
51
what is found at the base of the taste bud
dendrites of the afferent
| sensory neurons of CN VII (ant 2/3) and glossopharyngeal (post 1/3)
52
location of nucleus for the taste bud
along the center-neuroepithelial and supporting
| near base-basal
53
nuclous of neuropiethlial cells
obvious and ciricular
54
nucleous of supporting cels of taste bud
less circular
55
roll of basal cells of taste buds
stems cells to give the neuroepithelial and supporting cells
56
what is the enamel tissue
acellular, mineralized with no collogen.
made of 90% HA
interlocking rods extending from DEJ to surface of enamel
57
what makes an enamel rod
an enamoblast cell (from ectoderm)
58
makes up the bulk of the tooth
dentin
59
what is dentin
70% HA with collogen
60
what makes the dentin
odontoblasts
61
where are odontoblast
along the pulp cavity
62
what do odontoblasts secrete
predentin
63
what are odontoblasts derived from
mesenchyme (neural crest cells)
64
what is the pump cavity consist of
resembles mesenchyme
lined by odontoblasts
also fibroblasts with collogen plus ground substance
vessels and with nerve
65
the primary bone of the maxilla or mandible
alveolar
66
what makes up the periodontal ligaments
collogen bundles of approximately 150-350 microns thick connecting cementum to alveolar bone
67
gingiva at the free margin epithelium
parakeratinized stratified squamish epithelium
68
how much saliva is produced by major salivary glands
90%
69
what inhibits saliva production
sympathetic
70
location of minor salivary glands
in oral submucosa
71
roll of saliva
protect and digest
72
what enzyme in saliva breaks down carbs
amylase
73
2 major cell types of salivary gland
serous
| mucous
74
physical description of serous cells
```
polarized, pyramidal
basophilic cytoplasm (RER and Free ribosomes)
```
75
what do serous cells secrete
secretory granules/zymogen (PR)
76
physical description of mucous cells
cuboidal/columnar
| nucleous at base of cell
77
what do mucous cells produce
hydrophilic glycoprotein mucins
78
the initial part of the duct system of the salivary glands
myoepithelial cells
79
location of myoepithelial cels
within basal almina of secretory unit
80
roll of myoepitheial cells
contract and accellerates secretion
| prevents distention when lumen fills
81
the functional unit of the salivary gland
salivon
82
what makes up the salivon
acinus, intercalated duct, striated duct, excetory duct
83
a blind sac of the salivary gland composed of secretory cells (secretory portion of salivon
acinus
84
3 types of acinus in the salivon
serous acini
mucous acini
mixed acini
85
cells of the serous acini
sereous cells only, generally spherical
86
cells of mucous acini
mucous cells only, generaly tubular
87
cells of mixed acini
serous and mucous
88
the cap of serous cells in mixed acini due to traditional fixation methods, found in sublingual and submandibular glands
serous demilunes
89
3 segments of salivary gland ducts
intercalated ducts
striated ducts
interlobar/excretory ducts
90
intercalated ducts come from
acini
91
cels of intercalated ducts
low cuboidal epithelials
92
roll of intercalated ducts
modifies serous secretion
93
striations of striated ducts come from
infoldings of basal plasma membrane
94
cells of striated ducts
simple cuboidal to columnar epithelium
95
roll of striated ducts
modifies serous secretion
96
cells of interlobarl/excretory ducts
simple cuoidal/ pseudostratified columnar
stratified cuboidal to stratified squamous
becomes keratinized as it reaches oral epithelium
97
largest salivary gland
parotid gland
98
location of the parotid gland
extraoral
99
where is the parotid papilla
at the end of the parotid duct at the 2nd molar
100
what acinar are found in the parotid gland
branched acinar (serous)
101
location of the submandibular gland
under the floor of the mouth extra orally
102
where does the submandibular gland leave
via the submandibular duct through the frenulum
103
what acinar arefound in the submandibular gland
branched tubuloacinar (mixed but mostly serous)
104
smallest salivary gland
sublingual gland
105
location of the sublingual gland
floor of mouth, intraorally
106
duct of the sublingual gland
multiple with the sublingual fold
107
acini of sublingual gland
branched tubuloacinar and mixed, but mostely mucous
108
what are tonsils made of
lymphatic tissue
109
types of tonsils
```
palatine tonsils(oropharynx)
pharyngeal tonsils(nasopharynx)
Lingual tonsils (oropharynx)
```
110
all 3 tonsils together in the pharynx form
waldeyer's ring
111
epithelium of the tonsils
stratified squamous epithelium that continues down into the crypts
112
what is contained in the walls of the tonsil crypts
nodules
113
what obscures the epithelium deep into the crypts
lymphocytes
