oral cavity histology Flashcards
1
Q
what is the definition of digestion
A
food converted into absorbable substances, happens “outside” body
2
Q
what is the definition of digestion
A
food converted into absorbable substances, happens “outside” body
3
Q
what is the definition of digestion
A
food converted into absorbable substances, happens “outside” body
4
Q
What are the functions of the oral cavity
A
ingestion, mastication, deglutition
5
Q
what are the functions of the alimentary canal
A
deglutition
digestion
absorption
elimination
6
Q
What are the anterior and psoterior borders of the mouth
A
anterior are the lips and posterior is the palatoglossal folds
7
Q
describe the wall of the oral cavity
A
lined by a mucosa composed of stratified squamous non cornified epithelium with underlaying CT
8
Q
what parts of the oral cavity have a partially cornified to completely cornified area
A
lips, gingiva and hard palate
9
Q
What are the 3 main salivary glands
A
parotid
submandibular
sublingual
10
Q
what type of secretion is the parotid gland?
submandibular?
sublingual?
A
parotid is serous
submandibular is mixed serous and mucous
sublingual is largely mucous
11
Q
what is the role os salivary amylase
A
break down carbohydrates
12
Q
what enzymes are found in saliva
A
salivary amylase
lactoferrin and lysozymes
secretory Ig
13
Q
what is lactoferrin and lysozymes good for
A
antibacterial agents
14
Q
what is the main Ig found in oral cavity
A
IgA
15
Q
where are the extra minor salivary glands found
A
CT elements of oral mucosa
16
Q
which salivary gland is the biggest
A
parotid
17
Q
what is the structure of the parotid gland
A
tubulo acinar gland
18
Q
what is a defining characteristic of the parotid gland
A
adipose tissue in the gland
19
Q
what is the primary product of the parotid gland
A
salivary amylase
20
Q
Which gland accounts for majority of saliva
A
the submandibular
21
Q
how do submandibular gland cells look on histo
A
serous demilunes are the secreting cells
22
Q
what do submandiblar glands secrete
A
salivary amylase and mucins via serous cells and mucous cells
23
Q
describe characterristics of sublingual glands
A
many more mucous cells than submandibular still some serous demilunes
24
Q
What are the three layers of the lips
A
external, vermillion and internal
25
describe the vermillion zone of lips
pink region with extensive dermal papillae to increase SA and many many capillary loops
devoid of hair and sweat glands
26
what gives lips their color
vermillion area
27
describe the vermillion zone of lips
pink region with extensive dermal papillae to increase SA and many many capillary loops
devoid of hair and sweat glands
28
What are the functions of the oral cavity
ingestion, mastication, deglutition
29
what are the functions of the alimentary canal
deglutition
digestion
absorption
elimination
30
What are the anterior and psoterior borders of the mouth
anterior are the lips and posterior is the palatoglossal folds
31
describe the wall of the oral cavity
lined by a mucosa composed of stratified squamous non cornified epithelium with underlaying CT
32
what parts of the oral cavity have a partially cornified to completely cornified area
lips, gingiva and hard palate
33
What are the 3 main salivary glands
parotid
submandibular
sublingual
34
what type of secretion is the parotid gland?
submandibular?
sublingual?
parotid is serous
submandibular is mixed serous and mucous
sublingual is largely mucous
35
what is the role os salivary amylase
break down carbohydrates
36
what enzymes are found in saliva
salivary amylase
lactoferrin and lysozymes
secretory Ig
37
what is lactoferrin and lysozymes good for
antibacterial agents
38
what is the main Ig found in oral cavity
IgA
39
where are the extra minor salivary glands found
CT elements of oral mucosa
40
which salivary gland is the biggest
parotid
41
what is the structure of the parotid gland
tubulo acinar gland
42
what is a defining characteristic of the parotid gland
adipose tissue in the gland
43
what is the primary product of the parotid gland
salivary amylase
44
Which gland accounts for majority of saliva
the submandibular
45
how do submandibular gland cells look on histo
serous demilunes are the secreting cells
46
what do submandiblar glands secrete
salivary amylase and mucins via serous cells and mucous cells
47
describe characterristics of sublingual glands
many more mucous cells than submandibular still some serous demilunes
48
what are the intrinsic mm of the tongue
superior longitudinal
inferior longitudinal
vertical
transverse
49
describe the external aspect of lip
normal thin skin layer and is continous with vermillion border
50
what gives lips their color
vermillion area
51
describe the vermillion zone of lips
pink region with extensive dermal papillae to increase SA and many many capillary loops
devoid of hair and sweat glands
52
What are the functions of the oral cavity
ingestion, mastication, deglutition
53
what are the functions of the alimentary canal
deglutition
digestion
absorption
elimination
54
What are the anterior and psoterior borders of the mouth
anterior are the lips and posterior is the palatoglossal folds
55
describe the wall of the oral cavity
lined by a mucosa composed of stratified squamous non cornified epithelium with underlaying CT
56
what parts of the oral cavity have a partially cornified to completely cornified area
lips, gingiva and hard palate
57
What are the 3 main salivary glands
parotid
submandibular
sublingual
58
what type of secretion is the parotid gland?
submandibular?
sublingual?
parotid is serous
submandibular is mixed serous and mucous
sublingual is largely mucous
59
what is the role os salivary amylase
break down carbohydrates
60
what enzymes are found in saliva
salivary amylase
lactoferrin and lysozymes
secretory Ig
61
what is lactoferrin and lysozymes good for
antibacterial agents
62
what is the main Ig found in oral cavity
IgA
63
where are the extra minor salivary glands found
CT elements of oral mucosa
64
which salivary gland is the biggest
parotid
65
what is the structure of the parotid gland
tubulo acinar gland
66
what is a defining characteristic of the parotid gland
adipose tissue in the gland
67
what is the primary product of the parotid gland
salivary amylase
68
Which gland accounts for majority of saliva
the submandibular
69
how do submandibular gland cells look on histo
serous demilunes are the secreting cells
70
what do submandiblar glands secrete
salivary amylase and mucins via serous cells and mucous cells
71
describe characterristics of sublingual glands
many more mucous cells than submandibular still some serous demilunes
72
What are the three layers of the lips
external, vermillion and internal
73
describe the external aspect of lip
normal thin skin layer and is continous with vermillion border
74
what gives lips their color
vermillion area
75
describe the vermillion zone of lips
pink region with extensive dermal papillae to increase SA and many many capillary loops
devoid of hair and sweat glands
76
describe the internal aspect of the lip
always wet with stratified squamous wet epithelium
| dense irregular CT underlying with many minor salivary glands
77
describe the sets of teeth in humans
```
20 decidious (milk teeth) when little
replaced by 32 permanent dvided into 20 succedaneous teeth and 12 molars
```
78
what is the visible portion of the tooth called
crown
79
what is the root of the tooth
region housed within alveolus which is the bony socket that the tooth sits in
80
what is the cervix portion of the tooth
between crown and root
81
what are the 3 substances the teeth are composed of
enamel, dentin and cementum
82
what structure produces enamel
ameloblasts
83
what structure produces dentin
odontoblasts
84
What is whithin the root canal of the teeth
gelatinous CT pulp
85
what is the apical foramen of the tooth
a passage for blood and lymph and nerves
86
what atructure of the teeth seals the cavity from subepithelial CT
the gingiva (gums)
87
what is the periodontal ligament
dense collagenous CT to bind tooth into the socket
88
what type of epithelium is on gums
stratified squamous epithelium partially cornified with dense irregular CT
collagen type I
89
what atttaches the epithelium lining of gums to the enamel surface
hemidesmosomes to form a barrier
90
Where is the hard palate in the mouth and describe epithelium
anterior
| stratified spumous epitheluim cornfield with dense irregular CT
91
what does the hard palate have also anteriorly? posteriorly?
anterior is the clusters of adipose
| posterior are minor salivary glands
92
where is the soft palate
posterior roof
93
describe the epithelium of the soft palate
stratified squamous noncornified with subjacent dense irregular CR and minor mucous salivary glands
94
what is the posterior extension of the soft palate and its epithelium
uvula lined by stratified squamous non-cornified epithelium
95
what type of glands are on uvula and what other cell type
serous and seromucous glands as well as muscular tissue
96
what are the functions of the uvula
help in speech and also to prevent reflux into nasal cavity during swallowing
97
what are the 2 muscle groups in the tongue
extrinsic muscles and intrinsic
98
what are the intrinsic mm of the tongue
superior longitudinal
inferior longitudinal
vertical
transverse
99
why are the inferior longitudinal m shorter than ithe superior in the tongue
because the root of the tongue takes alot of space
100
what type of glands are found in tongue
mucous- glands of nuhn
| serous- von ebners
101
what are the regions of the tongue
anteriore 2/3
posterior 1/3
separated by sulcus terminalis that has the foramen cecum
102
what covers the surface of the anterior 2/3s
lingual papillae
103
what are the 4 types of lingual papillae and wehre they are found
filiform papillae dorsolateral
fungiform to the dorsal surface
circumvallate anterior to sulcus terminale
foliate dorsal
104
what is the structure of the filiform papillae of the tongue
slender partially velvet appearance
stratified squamous cornified epithelium
function to scrape food off surface
do not have taste buds
105
describe fungiform papillae
look like mushroom
covered in stratified squamous non cornfield with red dots from subepithelial capillaries
do have taste buds on the dorsal aspect
106
describe circumvallate papillae
8-12 in V shape surrounded by epithelial lined groove
hace von ebner salivary glands into groove
tast buds are within the epithelium of the groove, not on the dorsum
107
describe foliate papillae
along posterolateral aspect in vertical furrows with functional taste buds as a neonate
slender ducts of serous minor glands empty into base of furrows located near core of tongue
108
when do the foliate taste buds disappear
2nd or 3rd year
109
what are taste buds
intraepithelial sensory organs
110
describe shape of taste buds
60-80 spindle shaped cells with a pore than opens onto squamous epithelium overlying taste bud
111
what are the 3 types of cells found in taste buds
gustatory
sustentacular
basal cells (progenitors)
112
describe the general structure of the cells found on taste buds
long slender microvilli called taste hairs
113
which taste bud cell is responsible for regeneration
basal
114
what are the 5 primary taste sensaions and divide them into 2 mechanisms
ion channels: salty and sour
| membrane R: sweet bitter and savory (umami)
115
the nerve fibers that enter the taste bud synapse on what type of cell
gustatory
116
how many tastes can one individual taste bud detect
one
