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Anatomy Module II > Oral Cavity > Flashcards

Oral Cavity Flashcards

1
Q

What are the two divisions of the oral cavity

A

vestibule- the space between gingiva and cheek

Oral Cavity proper- extends all the way to the oropharynx, bordered by soft and hard palate

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2
Q

What are the functions of the Oral Cavity (5)

A

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

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3
Q

How does the floor of mouth protect

A

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

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4
Q

What are the four tonsils

A

Palatine, Tubal, lingual, and pharyngeal

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5
Q

Oral Mucosa Layers

A

compare to Gi tract and Trachea

We have epithelium then connective lamina propria, no muscularis mucosa, then submucosa (with glands) then bone

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6
Q

Oral Mucoperiosteum layers

A

The gingiva and parts of hard palate

Have epithelium and lamina propria, and bone connected right to the periosteum. no gland parts

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7
Q

What are the three types of oral mucosa

A

Masticatory, Lining, Specialized

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8
Q

Masticatory Mucosa (structure, and location)

A

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

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9
Q

Lining mucosa (location and structure)

A

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

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10
Q

Specialized Mucosa (location and clinical)

A

Location - is on top of tongue

Clinical. Injections are easy and infections spread quick

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11
Q

Three parts of the lips

A

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

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12
Q

Alveolar Mucosa

A

the mucous membrane that the lip reflects on.

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13
Q

Vestibular (mucolabial) fold

A

the reflection point of the lip to the alveolar mucosa

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14
Q

Gingiva (location, and mucosa type, and CT)

A

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

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15
Q

Gingiva two parts

A

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

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16
Q

Dentogingival Junction (location)

A

Aka enamel space, deep in the space

weak spot for inflammation

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17
Q

Dentogingival Junction Cells that exist

A

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

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18
Q

How the dentogingival junction cells attach to tooth

A

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

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19
Q

Clinical Issues of epithelium (3)

A

Squamous cell carcinoma
Melanoma
Leukoplakia - white patch of keratinized epi

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20
Q

Connective tissue issues clinical coorelation

A

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

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21
Q

Tongue Function and Sides

A

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

22
Q

Dorsal Tongue features

A

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
Q

Ventral Tongue Cell Type

A

Lining Mucosa

24
Q

What are the four Papillae Types

A

Filiform Papillae
Foliate Papillae
Fungiform Papillae
Circumvallate vallate papillae

25
Q

Filiform papillae

A

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

26
Q

Foliate Papillae

A

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

27
Q

fungifrom papilla

A

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

28
Q

circumvallate/vallate papillae

A

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

29
Q

Van Ebners Gland

A

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

30
Q

Structure of Taste buds

A

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

31
Q

Three types of Taste bud cells

A

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
Q

Function of saliva

A

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

33
Q

Secretory portion vs duct portion of salivary gland

A

secretory - makes product release in to dut

Duct- modifies to final saliva

34
Q

Serous Cell

A

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

35
Q

Mucous cell

A

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

36
Q

path of the secretion

A

intercalated ducts to straiated ducts to the excretory duct

37
Q

Striated ducts structure

A

basal infoldeings with many mitochondria for sodium ion pumping

38
Q

What type of cells are glands made of

A

epithelium they are oral invaginations!!

39
Q

Three types of Acinus

A

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

40
Q

Serous Demilunes

A

serous cap over mucous cells that look cuboidal

41
Q

myoepithelial

A

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
Q

Cell types of the path of salivary ducts

A

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
Q

The three major salivary glands

A

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
Q

saliva production

A

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

45
Q

Dentin

A

less mineralized than enamel but more than bone

Type I collagen - organic component

46
Q

pulp Chamber

A

CT - lots of vascular nerves

diff from dentin

47
Q

Periodontal Ligament

A

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

48
Q

How the PDL is not just any ligament

A

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

49
Q

Sharpays fibers

A

ends of fibers that embedd in to alveolus and cementum

50
Q

function of PDL

A

function for tooth attachment support proprioception and pain

51
Q

scurvy

A

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

Anatomy Module II (9 decks)

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