Oral Cavity Flashcards

1
Q

4 Layers of GIT

A

Mucosa
Submucosa
Muscularis
Adventitia

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2
Q

Mucosae Components

A

Epith.
LP
Muscularis mucosa

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3
Q

Submucosa components

A

Depends on the location

  • dense CT and gland
  • N. plexus=submucosa plexus
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4
Q

Muscularis circular layer components

A

Sk. and sm. muscle

2-3 layers

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5
Q

longitudinal or circular in muscular layer

A

Longitudinal

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6
Q

Serosa or adventia in the GIT layer

A

depends on location

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7
Q

oral cavity anatonmy

A
Vestibule 
-space b/w lips/cheeks and teeth
Oral Cavity proper 
-b/w teeth and pharynx (back of throat)
-hard/soft palate (sup.)
-Tongue and mouth floor(inf.) 
Salivary glands
-ducts enter the oral cavity proper 
  :major salv. glands
-lesser glands assoc. w/ oral mucosa
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8
Q

Vestibule components

A
Lips 
-integument
-oral mucosa=inner aspect 
  :special epith (epith./LP)
-vermillion zone=b/w in/outer
-sk. muscle=core 
Rest of vestibule lined w/ oral mucosa w/ minor salivary gland
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9
Q

Oral mucosa skin type

A

st. sq. non-keratinized epith.

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10
Q

Define vermillion zone

A

Transition keratine to non-keratine

incre. of red b/c BV w/ incre of deep projection

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11
Q

Oral cavity proper-tongue structure

A

Oral mucosa forms papilla
Core=sk. muscle
-muscle oriented in 3 directions
-allow tongue to move in multiple planes (only few places this cn occur)

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12
Q

Oral cavity proper-tongue function

A

Taste=taste buds on papilla
Move food in oral cavity to teeth promoting physical brk dwn
Swallowing assistance=move food wn
Human=speech vs. other animals=grooming

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13
Q

Papilla

A

Mucosa projections on tongue

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14
Q

types of papilla

A
Filiform=no taste buds and thin
-para/keratin 
Fungiform=few taste bud (@ tips)
-mushrrom like shape
-taste buds not always hito. seen
-st. sq. epith. 
-parakeratin b/w filiform 
-might not see taste buds @ tip
-CT @ surface of pilia broader 
Foliate(ridges)=lateral taste buds
-MC on rats and not as much in adults 
-Ridges=sq/rectangle space 
-minor salivory gland=serous gland 
-found surrounding circumvallate (ducts lean into clefts)
Circumvallate=lateral taste buds
-common in shape in all mamals
-allow to wash food away to form new room for taste
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15
Q

Taste buds

A
W/in epith. w/ parakeratin overlays 
contain thin N. CT capsule 
Structures
-Taste pore
-microvilli (projection recpt. for chem. in food)
-supporting cells 
-sensory cells
-basal cells 
-N.
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16
Q

Van ebners gland

A

AKA lingual salivory gland (minor glands)
Serous gland releasing products into clefts of papilla
~Function as bowmans gland (olfactory gland)
Wash dwn food to taste new things

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17
Q

Teeth define

A

initial physical food brk dwn

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18
Q

2 major components of teeth

A

Enamel and dentin

19
Q

Enamel

A

Made up hydroxyapatitie (~Ca2+ crystal in bone)
Produce fluorapatite (incre. acid R)
Lays over dentin

20
Q

Dentin

A
Under neath enamel w/ lower conc. 
Incre. Ca2+ than bone 
Attached to periodonto memb./cemento enamel jucntion/epith. 
Dentin pulp 
-contains BV, N, and CT
Odontoblast=maintain dentin
21
Q

Where does the teeth sit in

A

alveolar bone

22
Q

Gingiva

A

Para/keratinzed St. sq. epith. to R abrasion while ating
Circular/dentogengival fibers=strong attach to alveolar bone
Away=standard oral mucosal

23
Q

The stages of tooth develop

A
Bud stage
Cap Stage
Bell stage
Appostion
Beginning of eruption 
Eruption into oral cavity
24
Q

Bud stage

A

B4 stg.=embryonic formation of dental lamina
A layer of laminal form epith.
-pushed into tissue from neural crest

25
Q

Cap stg.

A

Tooth bud from enamel organs

-surround papilla dental papilla

26
Q

Bell st.

A

Form 4th layer
Odontoblast form w/in dental blast as amenoblast layer form for enamel
bone crypt form (alveolar bone)

27
Q

Appostion stg.

A

Enamel and dentin produce

Crown forms

28
Q

Beginning of eruption

A

Root formation

Myofibroblast in periodonto ligament pull too into postion @ surface

29
Q

Eruption into oral cavity

A

After eruption not ameloblast on surface just enamel

30
Q

Hard palate

A
Keratinzed St. sq. epith. to R abrassion 
Bone
-Raphe=middle projection 
Thin layer of CT to cover bone
no glands/muscle 
Purpose=support/food movement
31
Q

Soft palate

A

Parakeratinzed st. sq. epith.
No bone
Thick layer of CT w/ adipose (allows for soft)
Muscosal gland s/ sk. muscle
Purpose=swallwoing aid
-sk. muscle contract sallowing food to go to oral –>esophagus

32
Q

Salivary gland-purpose

A

Ducts enter oral cavity proper (major salv. gland)

Lesser gland assoc. w/ oral mucosa

33
Q

Salivary gland-locations

A

minor and major

34
Q

Minor salivory gland

A

through oral cavity (van almor gland)

35
Q

Major salivary gland

A

Parotid
Sublingual
Submandib.

36
Q

Parotid

A

Define: secrotory gland is below/front of ear and duct open by 2n molar inoral
-sup. jaw
All sereous w protein secretion
See zymogen granules in cells

37
Q

Sublingual

A

Mouth floor
Duct open into submandibular duct and direct in mouth
Predom. seous w/ som mucous

38
Q

Submandib.

A

Mouth floor
Close to mandible
Predom. mucous w/ some sereous

39
Q

Types of mixed acinus

A

submandib./lingual
Comp.
-moucus/serous cells
intercalated ducts

40
Q

salivary gland duct

A
intercalated duct=low cubodial epith. 
Stratied duct/intrelob. =columnar 
Excretory duct/interlob. 
-Pst.-->st. cubdoal
-lrger
41
Q

Function of salivatory gland

A

saliva

42
Q

Saliva function

A

Lubercation/moisten oral mucosal/food easily swallow
protection against bact.
digestion

43
Q

Saliva comp.

A

Prot.
-alpha amylase=brk dwn carb for digestion
-lyzozome=attack bact.
Glycop.
-mucin=lubercation
-cong. antiBD=produced by plasma cell b/w acin
Ion/h2o=include bicarb. ion to buffer oral cavity
IgA=polymerized
-attack bact.