Anatomy Chapter 9 Epithelium Of Oral Mucosa

Front 1

How many types of stratified squamous epithelium is found within the oral cavity

Back 1

3

Front 2

What are the 3 types of stratified squamous epithelium in the oral cavity?

Back 2

Non keratinized

Orthokeratinized

Parakeratinized

Front 3

Non keratinized mucosa is associated with what kind of mucosa?

Back 3

Lining mucosa

Front 4

Orthakeratinized mucosa and Parakeratinized mucosa are associated with what kind of mucosa

Back 4

Masticatory Mucosa

Front 5

What do all forms of epithelium act as? (2)

Back 5

Barrier to pathogenic invasion and mechanical irritation

Offers Protection against dryness

Front 6

These protective features are accentuated in epithelium with what?

Back 6

Keratin

Front 7

Histologists use the term for epithelial cells in oral mucosa as what?

Back 7

Keratinocytes

Front 8

Why do Histologist use the term Keratinocytes for epithelial cells in the oral mucosa?

Back 8

They can produce keratin either naturally at normal levels if it is keratinized tissue

or at higher levels when the tissue becomes traumatized even in nonkeratinized tissue

Front 9

True or False

Non-keratinocytes, those cells that do not produce Keratin, may be present in much smaller numbers in the epithelium

Back 9

True

Front 10

What are some kinds of Non-keratinocytes?

Back 10

Melanocytes

Langerhans

Granstein Cells

Front 11

Langerhans and Gransteins both arise from what?

Back 11

Bone Marrow

Front 12

What are the most commonly occuring White Blood Cells in all forms of oral mucosa?

Back 12

Polymorphonuclear leukocyte (PMN)

Front 13

NONKERATINIZED STRATIFIED SQUAMOUS EPITHELIUM

Back 13

...............

Front 14

Nonkeratinized stratified squamous epithelium of in what?

Back 14

The superficial layer of the lining mucosa

Front 15

What is the most common form of epithelium in the oral cavity

Back 15

Nonkeratinized epithelium

Front 16

Each lining mucosa has how many layers within the epithelium?

Back 16

3

Front 17

What are the three layers within the epithelium of the lining mucosa

Back 17

Basal Layer

Intermediate Layer

Superficial Layer

Front 18

Basal Layer is what?

Back 18

The deepest of all three layers

Front 19

The basal layer is a single layer of what?

Back 19

Cuboidal epithelial cells overlying the basement membrane (superior to the lamina Propria

Front 20

The Basal layer (stratum basal) produces what?

Back 20

the basal lamina of the basement membrane

Front 21

The basal layer is considered germinative because of why?

Back 21

Mitosis of the epithelial cells occur within the layer

Front 22

What layer of epithelium is superficial to the basal layer?

Back 22

Intermediate Layer

(stratum intermedium)

Front 23

What is the intermediate layer composed of?

Back 23

Larger, stacked, polyhedral- shaped cells

Front 24

The polyhedral-shaped cells appear larger or plumber than the basal layer cells, because of why?

Back 24

Has Larger amounts of cytoplasm

Front 25

The cells of the intermediate layer have lost their ability to what?

Back 25

Undergo Mitosis as they migrate

Front 26

What layer makes up the bulk of nonkeratinized epithelium

Back 26

Intermediate layer

Front 27

What is the most superficial level in nonkeratinzed epithelium?

Back 27

Superficial Layer (Stratum superficiale)

Front 28

The Superficial level is composed of what?

Back 28

Even larger similarly stacked polyhedral epithelial cells with the outer cells flattening into squames

Front 29

The squames in these layer show what?

Back 29

Shedding or loss as they age and die during the turnover of the tissue

Front 30

Maturation within this tissue is seen only as what?

Back 30

an increase in the size of cells as they migrate superficially

Front 31

ORTHOKERATINIZED STRATIFIED SQUAMOUS EPITHELIUM

Back 31

...............

Front 32

What is the least common form of epithelium found in the oral cavity?

Back 32

Orthokeratinized Stratified Squamous Epithelium

Front 33

What is the Orthokeratinized Stratified Squamous Epithelium associated with?

Back 33

Masticatory Mucosa of the hard palate and attached gingiva

Specialized Mucosa of the Dorsal surface of the tongue

Front 34

As this tissue matures it forms what within its superficial cells?

Back 34

Keratin

Front 35

Orthokeratinzed epithelium has what?

Back 35

A single basal layer that undergoes mitosis

Front 36

the Orthokeratinized epithelium produces what?

Back 36

The basal lamina of the adjacent basement membrane

Front 37

Orthokeratinized Epithelium has how many layers superficial to the basal layer

Back 37

3 separate layers

Front 38

What are the 3 separate layers superficial to the basal layer in the orthokeratinized epithelium

Back 38

Prickle layer

Granular Layer

Keratin Layer

Front 39

What is superficial to the basal layer?

Back 39

Prickle layer (Stratum Spinosum)

Front 40

What does the prickly look come from in the prickle layer?

Back 40

Individual dehydrated epithelial cells are shrinking but still joined by their cellular junctions of desomones (Outer edges)

Front 41

Once they migrate to the superior level in the tissue, cells of the prickle layer lose what?

Back 41

Their ability to undergo mitosis

Front 42

What layer makes up the bulk of the Orthokeratinized epithelium

Back 42

Prickle Layer

Front 43

What layer is superficial to the Prickle Layer?

Back 43

Granular Layer (Stratum granulosm)

Front 44

In the granular layer the cells in this layer are what?

Back 44

Flat and stacked in a layer three to five cells thick

Front 45

Each of the cells have what?

Back 45

A nucleus and keratohyaline Granules

Front 46

What do the kerohyaline Granules form?

Back 46

a chemical precursor for the keratin that is found in the most superficial layers

Front 47

What is the most superficial layer in orthokeratinized epithelium?

Back 47

Keratin Layer (Stratum Corneum)

Front 48

The keratin layer shows what?

Back 48

Variable thickness depending on the region

Front 49

The cells in the keratin layer are what?

Back 49

Flat and have no nuclei and their cytoplasm is filled with keratin

Front 50

PARAKERATINIZED STRATIFIED SQUAMOUS EPITHELIUM

Back 50

...............

Front 51

Parakeratinized stratified squamous epithelium is associated with what?

Back 51

Masticatory mucosa of the attached gingiva in higher levels than the orthokeratinzed mucosa

Tongues Dorsal surface/ sulcular epithelium lining the sulcus

Front 52

Most histologist believe that parakeratinized epithelium is an immature form of what?

Back 52

Orthokeratinized Epithelium

Front 53

Presence of this form of keratinization on the skin is known as a what? but in the oral mucosa known as?

Back 53

disease state

but healthy for the normal oral cavity

Front 54

Parakeratinized epithelium have the same layers as the orthokeratinized epithelium what are they?

Back 54

Basal Layer

Prickle Layer

Granular Layer

Keratin Layer

Front 55

The Granular layer in the parakeratinized epithelium may be what?

Back 55

indistinct or absent altogether

Front 56

what is the main difference between the orthokeratinzed and the parakeratinized is what?

Back 56

The cells in the Keratin Layer of the parakeratinized epithelium

The most superficial layer is still being shed however still have a nuclei and keratin