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microanatomy > oral mucosa > Flashcards

oral mucosa Flashcards

1
Q

Oral Mucosa

A

constitutes a small percentage of the body’s total mass, it is vital in oral health & supporting various bodily functions.

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2
Q

What are the three types of oral mucosa based on location, function, and epithelium

A

Lining mucosa

Masticatory mucosa

Specialized mucosa

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2
Q

What are the main layers of the oral mucosa?

A

Oral Epithelium (3 types, 3-4 layers)

Lamina Propria (2 layers)

Submucosa (closely associated but not part of the mucosa)

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3
Q

Is the submucosa associated with the oral mucosa?

A

closely associated with, but NOT part of the mucosa.

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4
Q

Lining

A

Lines majority of the oral cavity & vestibule; protection & stretch

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5
Q

Masticatory

A

Lines gingiva & hard palate; areas that undergo abrasive forces during mastication

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6
Q

Specialized

A

Lines dorsal surface of tongue; mechanical functions & taste

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7
Q

How many layers does the lining mucosa have, and how does this compare to other types of mucosa?

A

3 distinct layers.

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8
Q

Is the lining mucosa keratinized or non-keratinized?

A

non-keratinized.

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9
Q

Does the lining mucosa contain the stratum lucidum or stratum granulosum?

A

No

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10
Q

How many layers does the masticatory mucosa have?

A

3 distinct layers.

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11
Q

Is the masticatory mucosa fully keratinized?

A

not fully keratinized and contains pyknotic nuclei.

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12
Q

Does the masticatory mucosa contain the stratum lucidum or stratum granulosum?

A

No

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13
Q

How many layers does the specialized mucosa have?

A

4 distinct layers.

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14
Q

Is the specialized mucosa fully keratinized?

A

Yes, fully keratinized, with cells forming squames.

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15
Q

Does the specialized mucosa contain the stratum lucidum and stratum granulosum?

A

no stratum lucidum, but it does have the stratum granulosum.

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16
Q

Submucosa components

A
  • Loose ct, Fat cells, Blood vessels, Nerves, Salivary glands
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17
Q

Submucosa is present in?

A

Lining, specialized mucosa

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18
Q

submucosa is only present in the lateral hard palate of what mucosa

A

Masticatory

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19
Q

What is the function of the lining mucosa?

A

protection and stretch.

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19
Q

Where is the lining mucosa located in the oral cavity?

A

majority of the oral cavity and vestibule, including the cheeks, lips, soft palate, uvula, alveolar areas, and sublingual region.

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20
Q

What type of epithelium does the lining mucosa have?

A

non-keratinized epithelium.

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21
Q

Describe the lamina propria papillae of the lining mucosa.

A

few, shallow papillae in the lamina propria.

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22
Q

Is the submucosa present in the lining mucosa?

A

Yes

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23
Q

What is the function of the masticatory mucosa?

A

protect against the forces of mastication.

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24
Q

Where is the masticatory mucosa located in the oral cavity?

A

located on the gingiva and the hard palate.

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25
Q

What type of epithelium does the masticatory mucosa have?

A

parakeratinized or orthokeratinized epithelium.

26
Q

Describe the lamina propria papillae of the masticatory mucosa.

A

tall

27
Q

Is there a submucosa in the masticatory mucosa?

A

only present in the lateral hard palate, where it includes a fatty zone and a glandular zone.

28
Q

What is the function of the specialized mucosa?

A

taste

29
Q

Where is the specialized mucosa located in the oral cavity?

A

dorsal surface of the tongue.

30
Q

What type of epithelium does the specialized mucosa have?

A

parakeratinized or orthokeratinized epithelium.

31
Q

Describe the lamina propria papillae of the specialized mucosa.

A

lots of thick papillae.

32
Q

Is the submucosa present in the specialized mucosa?

A

Yes

33
Q

Papillae

A
  • Epithelium covering a CT core
34
Q

Where are the filiform papillae located on the tongue?

A

located on the anterior two-thirds of the dorsal surface of the tongue.

35
Q

What is notable about the number of filiform papillae?

A

most numerous type of papillae on the tongue.

35
Q

What kind of surface do filiform papillae provide?

A

tough, abrasive surface on the tongue.

36
Q

Do filiform papillae contain taste buds?

A

do not contain taste buds.

37
Q

How numerous are fungiform papillae compared to filiform papillae?

A

less numerous than filiform papillae.

38
Q

What is the shape of fungiform papillae?

A

mushroom-shaped.

39
Q

Do fungiform papillae contain taste buds?

A

Yes, taste buds on their surface.

40
Q

How many circumvallate papillae are typically present on the tongue, and where are they located?

A

typically 8–10 circumvallate papillae located near the sulcus terminalis.

40
Q

What type of epithelium is found on the circumvallate papillae?

A

non-keratinized epithelium on their lateral walls.

41
Q

What unique structure surrounds the circumvallate papillae?

A

surrounded by a moat-like structure.

42
Q

Where are the taste buds located on circumvallate papillae?

A

located on the lateral walls.

43
Q

What glands are associated with the circumvallate papillae?

A

Von Ebner glands are clustered around

44
Q

What substances are generally associated with the sweet taste?

A

sugars and certain amino acids.

45
Q

What type of compounds typically produce a sour taste?

A

linked to acids, such as citric acid in lemons.

46
Q

What is the salty taste usually related to?

A

sodium ions

47
Q

Why is the bitter taste important, and what is it often associated with?

A

associated with various compounds, many of which can be toxic, serving as a natural warning.

47
Q

What is umami taste linked to, and where is it commonly found?

A

linked to amino acids like glutamate, commonly found in foods like meats, cheeses, and mushrooms.

48
Q

What are the main layers of the cutaneous membrane (skin)?

A

The main layers are the epidermis, dermis, and hypodermis.

49
Q

Which glands are associated with the cutaneous membrane?

A

The cutaneous membrane contains sweat glands.

50
Q

What structures related to hair are found in the cutaneous membrane?

A

includes hair follicles.

51
Q

What type of tissue makes up the vermilion zone?

A

epithelium and lamina propria.

52
Q

What are the three main layers found in the mucosa membrane (lining mucosa)?

A

The three main layers are epithelium, lamina propria, and submucosa.

53
Q

Which type of glands are present in the mucosa membrane (lining mucosa)?

A

minor salivary glands.

54
Q

Mucogingival Junction

A

Between adjacent gingiva & alveolar regions, transitioning from lining to masticatory mucosa.

55
Q

Does the oral cavity encounter abrasive forces?

A

Yes, variation in keratinocytes depending on region

56
Q

Do we have immune function in the oral cavity?

A

Yes, Langerhans in stratum Spinosum layer just like skin!

57
Q

Do we have pigment in the oral cavity?

A

Yes, melanocytes in stratum Basale just like skin

58
Q

Do we have hair in oral cavity?

A

No, however tooth development follows a similar pattern

59
Q

Do we have glands in our oral cavity?

A

Yes, specifically salivary glands (no sweat, few sebaceous?)

60
Q

Do we have sensation in our oral cavity?

A

Yes, same tactical receptors as skin!

microanatomy (9 decks)

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