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Ethmoid Bulla aka Oral Histology Exam 2 > 1 Overview of Oral Cavity and Oropharynx > Flashcards

1 Overview of Oral Cavity and Oropharynx Flashcards

1
Q

what begins as an ectodermal depression and represents the future oral cavity/mouth?

A

stomodeum

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2
Q

what is surrounded by the frontonasal region and the maxillary and mandibular processes of PA1?

A

stomodeum

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3
Q

what develops as part of the pharyngeal tube and is endodermally derived?

A

oropharynx

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4
Q

what PA does the oropharynx arise predominantly from?

A

PA 2, 3, and 4 (with a minor contribution)

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5
Q

what are the two parts of the oral cavity?

A
  1. oral vestibule
  2. oral cavity proper
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6
Q

what is the space between the lips (labial), cheeks (buccal) and anterior tooth surface?

A

oral vestibule

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7
Q

anterior and posterior boundary of the oral vestibule

A

anterior - lips

posterior - ramus of mandible

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8
Q

lateral and medial boundary of the oral vestibule

A

lateral - cheeks

medial - anterior tooth/gingiva/dental arch

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9
Q

function of the oral vestibule

A

chewing/mastication, speech

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10
Q

contents in the region of oral vestibule

A
  1. oral mucosa lining
  2. minor salivary glands of cheek and lips
  3. skeletal ms. of cheek and lips
  4. opening of parotid duct
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11
Q

what is the oval shaped area enclosed by upper and lower dental arch and opens posteriorly to oropharynx?

A

oral cavity proper

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12
Q

roof (superior) and floor (inferior) boundaries of the oral cavity proper

A

roof (superior) - hard and soft palate

floor (inferior) - tongue/floor of mouth

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13
Q

anterior/lateral and posterior boundary of the oral cavity proper

A

anterior/lateral - dental arch

posterior - palatine arch/palatoglossal fold

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14
Q

function of oral cavity proper

A

mechanical and chemical digestion, bolus formation, and speech

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15
Q

contents of oral cavity proper (10)

A
  1. oral mucosa covers all structures except tooth
  2. alveolar process/dental arch of max and mand
  3. teeth/periodontium
  4. gingiva
  5. tongue (oral part)
  6. floor of mouth
  7. sublingual caruncle (ducts for submandibular and sublingual glands)
  8. hard and soft palate
  9. minor salivary glands of dorsum and ventral tongue and palatal mucosa
  10. retromolar trigone (small triangular area posterior to 3rd molar)
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16
Q

what is the passage from oral cavity to oropharynx

A

oropharyngeal isthmus

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17
Q

superior and inferior boundaries of oropharynx

A

superior - soft palate

inferior - epiglottis

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18
Q

anterior and posterior boundaries of oropharynx

A

anterior - oral cavity proper/palatoglossal fold/base of tongue

posterior - pharyngeal muscles and C2 and C3

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19
Q

lateral walls of oropharynx

A

palatopharyngeal arch and tonsil

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20
Q

contents of oropharynx (7)

A
  1. oral/pharyngeal mucosa covering structures
  2. minor salivary glands
  3. palatopharyngeal fold
  4. palatine tonsil/tonsillar fossa
  5. pharyngeal tongue - tongue base
  6. lingual tonsils
  7. skeletal muscles of pharyngeal wall
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21
Q

what refers to a mucous membrane that lines a passageway leading to the outside surface of lines a hollow organ?

A

mucosa

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22
Q

Mucosa = _____ + _____

A

Mucosa = epithelium + variable amount of CT

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23
Q

Oral mucosal epithelium may be derived from ___ or ___ depending on location

A

ectoderm or endoderm

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24
Q

T/F: oral mucosa includes regions of the lips thru oropharynx

A

TRUE

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25
Q

what are the general components of oral mucosa

A
  1. oral epithelium
  2. lamina propria
  3. submucosa
  4. skeletal muscle or bone
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26
Q

in relation to the oral mucosa…

what is stratified squamous w/ variable amounts of keratinization?

A

oral epithelium

27
Q

in relation to the oral mucosa…

what is the underlying CT containing capillaries, ducts of salivary glands, and sensory receptors?

A

lamina propria

28
Q

in relation to the oral mucosa…

what is present in variable amounts, composed of LCT -> DICT, contains vessels, adipose, minor salivary glands, and sensory receptors?

A

submucosa

29
Q

in relation to the oral mucosa…

what lies deep to the mucosa?

A

skeletal ms. or bone

30
Q

what is the region where the attached gingival mucosa reflects off bone and onto alveolar mucosa (transition point)

A

mucogingival fold

31
Q

what is the region which lacks a submucosa and lamina propria attaches directly to periosteum of bone?

A

mucoperiosteum

32
Q

what is the fold of oral mucosa anchoring the alveolar process to lip, cheek, or ventral tongue to floor of mouth?

A

frenulum

33
Q

what epithelium is ALWAYS stratified squamous with variable amounts of keratinization?

A

epithelium associated w/ oral mucosa

34
Q

amount of keratinization is usually correlated with what? how can it be altered?

A

correlated with primary function of area and can be altered based on external events

35
Q

turnover of epithelium is slower in regions with what?

A

regions with kerainization

36
Q

key features of SSNK

A
  1. no stratum corneum
  2. nuclei RETAINED in superficial layer
37
Q

layers in SSNK from free surface to BM

A

stratum superficialis
stratum inermedium
stratum spinosum
stratum basal

38
Q

key features of SSPK

A
  1. minimal to absent SC (keratin filaments)
  2. nuclei RETAINED in superficial layer
39
Q

layers in SSPK from free surface to BM

A

stratum superficialis
stratum granulosum
stratum spinosum
stratum basal

40
Q

key features of SSK orthokeratinized

A
  1. stratum corneum present, nuclei LOST
  2. keratin filaments visible on surface
41
Q

layers in SSK - orthokeratinized from free surface to BM

A

stratum corneum
stratum granulosium
stratum spinosum
stratum basal

42
Q

3 types of oral mucosa

A
  1. lining
  2. specialized
  3. masticatory
43
Q

what mucosa is most moist due to secretions, is less exposed to abrasion, and is soft, pliable, and movable?

A

lining mucosa

44
Q

location of lining mucosa

A

wide distribution majority of oral cavity and oropharynx

45
Q

lining mucosa epithelium

A

SSNK

46
Q

describe lining mucosa lamina propria

A

LCT high elastic fibers; well vascularized

47
Q

describe lining mucosa submucosa

A

well developed and usually attached to underlying ms., highly flexible, and contains minor salivary glands

48
Q

what glands are present in the submucosa of lining mucosa

A

minor salivary glands

49
Q

what mucosa functions in mastication, and is firm and immobile?

A

masticatory mucosa

50
Q

location of masticatory mucosa

A

hard palate, gingiva, and interdental papilla

51
Q

masticatory mucosa epithelium

A

SSPK to SSK

52
Q

describe lamina propria of masticatory mucosa

A

LCT w/ high dense collagen fibers attached directly to bone

53
Q

what is LP bound directly to bone and is present in some regions of palate and gingiva?

A

mucoperiosteum

54
Q

descrcibe submucosa of masticatory mucosa

A

thin to absent

55
Q

what mucosa refers to the presence of surface elevations of mucosa known as lingual papillae

A

specialized mucosa

56
Q

T/F: lingual papillae may contain taste buds

A

TRUE

57
Q

location of specialized muocsa

A

dorsum of anterior 2/3 of tongue
vermillion zone

58
Q

specialized mucosa epithelium

A

SSK

59
Q

specialized mucosa lamina propria

A

thin

60
Q

specilized mucosa submucosa

A

thin to absent; minor salivary glands may be present, bound to skeletal ms

61
Q

what type of glands may be found in specialized mucosa?

A

minor salivary glands

62
Q

how many types of lingual papilla are there and their general function?

A

4 types
surface elevations to aid in mixing food

63
Q

are taste buds found on all lingual papillae?

A

NO! All except filiform

Ethmoid Bulla aka Oral Histology Exam 2 (7 decks)

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