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Anatomy Module II > Oral Cavity > Flashcards

Flashcards in Oral Cavity Deck (51):
1

What are the two divisions of the oral cavity

vestibule- the space between gingiva and cheek
Oral Cavity proper- extends all the way to the oropharynx, bordered by soft and hard palate

2

What are the functions of the Oral Cavity (5)

Propulsion
Start Digestion
Protection - tonsils. there is an impermeable barrier (except floor of mouth,)
Sensation - taste, touch, pain, temp, reflex
Secretion - saliva, and mucous

3

How does the floor of mouth protect

lipid derived membrane coating granules are released in to the space. and they protect.

4

What are the four tonsils

Palatine, Tubal, lingual, and pharyngeal

5

Oral Mucosa Layers

compare to Gi tract and Trachea
We have epithelium then connective lamina propria, no muscularis mucosa, then submucosa (with glands) then bone

6

Oral Mucoperiosteum layers

The gingiva and parts of hard palate
Have epithelium and lamina propria, and bone connected right to the periosteum. no gland parts

7

What are the three types of oral mucosa

Masticatory, Lining, Specialized

8

Masticatory Mucosa (structure, and location)

Location - gingiva and epithelium
Structure - start squamous keratinized or parakeratinized (with nucleus an keritan)
has lamina propria then bone (no mucosa and such)
inflexible. Infection spreads slowly

9

Lining mucosa (location and structure)

majority of cavity, cheeks, lips, undertongue, soft palate
Structure - stratified squamous non keratinized .
Has elastic fibers for flexible. very thick and impermeable
except floor of which is thin and permeable

10

Specialized Mucosa (location and clinical)

Location - is on top of tongue
Clinical. Injections are easy and infections spread quick

11

Three parts of the lips

Cutaneous - skin part with hair follicles and glands
Vermillion Border - dry red portion, still keratinized epithelium, but with connective tissue papillae and capilary looping into dermal papillae no glands
Oral Mucosa - inner mucous membrane thick epithelium non keratinized, minor salivary glands

12

Alveolar Mucosa

the mucous membrane that the lip reflects on.

13

Vestibular (mucolabial) fold

the reflection point of the lip to the alveolar mucosa

14

Gingiva (location, and mucosa type, and CT)

mucosa surrounding tooth, it is masticatory mucosa.
Tight to bone with dense CT
epithelial of lip is much looser CT

15

Gingiva two parts

Gingival Mucosa - faces the oral cavity
The Junctional Epithelium - faces the teeth
Adheres to enamel and cementum by HEMIDESMOSOMES

16

Dentogingival Junction (location)

Aka enamel space, deep in the space
weak spot for inflammation

17

Dentogingival Junction Cells that exist

Basal cells on basal lamina interfere with connective tissue. (basal lamina is CT)
Cells have non keratinized with inner basement membrane

18

How the dentogingival junction cells attach to tooth

Outer Attaches to hard tissue of tooth by epithelial attachment
the inner basal lamina adhere to the tooth by hemidesmosomes

19

Clinical Issues of epithelium (3)

Squamous cell carcinoma
Melanoma
Leukoplakia - white patch of keratinized epi

20

Connective tissue issues clinical coorelation

Lamina propria is the loose CT to the submucosa, if there is fibrosis then this becomes dense regular and look weird
this is smokers stuff

21

Tongue Function and Sides

Spleen Propulsion, digest, swallow
Dorsal and Ventral
has muscle and lined with mucous membrane

22

Dorsal Tongue features

Specialized epithelium
anterior 2/3 is stratified squamous, folds of papilla projecting from mucosa, can see circumvalley papilla!!!!
Back third is the root lingual tonsil

23

Ventral Tongue Cell Type

Lining Mucosa

24

What are the four Papillae Types

Filiform Papillae
Foliate Papillae
Fungiform Papillae
Circumvallate vallate papillae

25

Filiform papillae

smallest most numerous with no taste buds. Conical projections of CT covered by keratinized stratified squamous
Function is mechanical

26

Foliate Papillae

Seen in kids not much on older, are deep clefts on lateral of tongue. many many taste buds

27

fungifrom papilla

are muschroom shapes scattered on tip of tongue full of taste buds

28

circumvallate/vallate papillae

dome shaped with invagination fangs, invagination wth taste buds that are located laterally

29

Van Ebners Gland

minor salivary gland that produces only serous product and located deep in the curcumvallate papilla

30

Structure of Taste buds

fusiform shape converging to a taste pore apically and sends to nerve

31

Three types of Taste bud cells

neuroepithelial cell - has receptor for taste, usse microvilli, last 7-10 days
supportin cells - microvilli on apical aspect, but do not synapse
Basal cells - small stem cells to produce the other two

32

Function of saliva

moisten food, stim taste buds, buffer, repair, digestion, and tooth devo

33

Secretory portion vs duct portion of salivary gland

secretory - makes product release in to dut
Duct- modifies to final saliva

34

Serous Cell

in acinus, nucleus in basal
Stain basophillic.
zymogen granules are apical

35

Mucous cell

Very rounded appear empty because stain removes mucous. Nucleus is basal

36

path of the secretion

intercalated ducts to straiated ducts to the excretory duct

37

Striated ducts structure

basal infoldeings with many mitochondria for sodium ion pumping

38

What type of cells are glands made of

epithelium they are oral invaginations!!

39

Three types of Acinus

serous, mucous (cells have mucinogen granules so look empty) mixed acini

40

Serous Demilunes

serous cap over mucous cells that look cuboidal

41

myoepithelial

forms basket around secretory, derived from epithelium,
actin filaments extend out, found betwen the plasma mambrane of acinar cells and basal lamina
compress and aid in trasnsport

42

Cell types of the path of salivary ducts

Intercalated ducts- are low cuboidal
Striated - become columnar, paired with capillary blood vessels. stain very eoisinophillic
Excretory - larger dut connect to oral cavity, travel through conncective tissue, become pseudostratified to stratified squamous

43

The three major salivary glands

parotid gland - completely serous , enclosed in tough CT capsule, in stain we dont see mucous, fatty tissue there for flex
submandibular gland - mixed acini duct runs beneath frenulum of tongue
sublingual glands - mostly mucous glands, empty into submandibular duct or floor v short

44

saliva production

blood vessels around strirated duct water flows in at start form primary saliva, modified in striated to become hypotonic and secondary saliva

45

Dentin

less mineralized than enamel but more than bone
Type I collagen - organic component

46

pulp Chamber

CT - lots of vascular nerves
diff from dentin

47

Periodontal Ligament

between cementum of root and alveolar bone
Composed of Collagen Type I
huge blood supply

48

How the PDL is not just any ligament

a huge blood supply, has lots of nerves has many cells

49

Sharpays fibers

ends of fibers that embedd in to alveolus and cementum

50

function of PDL

function for tooth attachment support proprioception and pain

51

scurvy

decrease in vitamin C - cause atrophy, defecin in fibers loose in sockets