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HNSS > 15-Oral Histology brainscape > Flashcards

15-Oral Histology brainscape Flashcards

1
Q

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A

Lip *Small Arrow =fully keratinized stratified squamous epithelium *Large Arrow= hair

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2
Q

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Lip *Arrow- fully keratinized stratified squamous epithelium *SB- Sebaceous gland *Green- hair follicle

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3
Q

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Inside of the lips *Between arrows= keratinized stratified squamous epithelium

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4
Q

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Cross Section Through Anterior 2/3 of Tongue *F= Fungiform Papillae *V= Circumvallate Papillae

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5
Q

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SKeletal muscle in cross section of the tongue

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6
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Filiform Papillae = DO NOT HAVE TASTE BUDS

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7
Q

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Fungiform Papillae *Taste buds at the arrow

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8
Q

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Circumvallate PapillaeYellow Arrow = Duct of von Ebner White Arrow= gland of von Eber

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9
Q

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A

Taste bud in the valley of Circumvallate Papillae

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10
Q

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A

Tatse Bud: Green arrow: Basal cells (stem, progenitor cells) Pink Arrow: Supporting cells Small Black: Sensory cells

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11
Q

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Teeth of an infant

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12
Q

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Teeth of an adult

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13
Q

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d= dentin p= pump small arrow= odontoblasts Large argow- space between dentin & ameloblasts

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14
Q

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d= dentin p= pulp cavity o= odontoblasts a= ameloblastic layer Large arrow= enamel small arrow= predentin

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15
Q

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16
Q

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A

arrow= enamel d= dentin p= pulp cavity a= alveolar bone

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17
Q

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e= enamel d= dentin p= pulp cavity *Can also see lines of Retzius

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18
Q

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A

D= Dentin P= pulp cavity e= enamel

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19
Q

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D= Dentin C= Cementum small black arrows= cementocytes yellow arrow= dentin tubules

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20
Q

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d= dentin p= pulp cavity a= alveolar bone s- gingival sulcus arrow near bottom of tooth= periodontal ligament thin red line on tooth= cementum

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21
Q

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A

G= gingival sulcus Arrow= transition to non-keratinized stratified squamous epithelium

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22
Q

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a= alveolar bone p= periodontal ligament c= cementum d= dentin

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23
Q

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Parotid Gland - entirely serous (interlobular duct seen near the arrow)

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24
Q

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Interlobular duct in the parotid gland

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25
Q

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*Parotid DuctSmall intercalated duct at white arrow leading to larger striated duct (SD)

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26
Q

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Parotid from old person (lots of fat)

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27
Q

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A

Submandibular Gland *Yellow arrow= striated ducts Black arrow= mucous cells other darker cells = serous cells

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28
Q

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A

Serous demilunes in a submandibular gland

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29
Q

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A

Sublingual gland- serous cells only at arrows, everything else is mucous

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30
Q

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A

Serous Cell: N= nucleus M= Mitochondria RER= Rough ER

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31
Q

Apical Foramen

A

Valley within the alveolar bone extension through which the root canal comes through. Contains all blood vessels and nervous tissue that supply the pulp

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32
Q

Cell Type of salivary Glands

A

1) Serous Cells 2) Mucous cells 3) Myoepithelial cells 4) Plasma cells

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33
Q

Cells of Taste Buds

A

1) Sensory cells 2) Supportive Cells 3) Progenitor Cells (aka basla cells)

*Taste hairs - located on the top of each taste bud

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34
Q

Cementum

A

bone-like calcified matrix that covers the dentin of the root *Produced by cementocytes *Provides anchor-sites for Sharpey’s fibers

cemetoclasts withing the lacunae

cementoblast in exteriro border

35
Q

Circumvallate Papillae

A

*Large circular structures (10-12) each with surrounding “moat” located just in front of the sulcus terminalis

36
Q

Classification of Parotid, Submandibular, Sublingual Glands

A

Parotid= Compound Acinar Submandibular= Compound tubulo-acinar Sublingual= Compound tubulo-acinar

37
Q

Composition fo the external surface of the cheek

A

keratinized stratified squamous epithelium

38
Q

Dental pulp

A

Gelatinous CT that fills the pulp cavity including the root canal *Highly vascularized & innervated

39
Q

Dentin

A

Hard but resilient calcified tissue (70% dry weight) *Organic matrix (predentin) is here and produced by odontoblasts (which is not shed, we can keep making dentin as long as our teeth are vascularized)

exam ?

40
Q

Difference between odontoblasts & ameloblasts

A

*Odontoblasts –> Dentin (blasts are protected, located in pulp cavity and continue to make dentin once tooth erupts) They are simple columnar epithelium cells.

*Ameloblasts –> Enamel (blasts are shed once tooth protrudes into oral cavity)

41
Q

Differences between the epidermis of the skin & the oral mucous membrane

A

1) Mucous membrane is stratified squamous epithelium (mostly nonkeratinized) 2) Wet mucosa 3) Highly permeable to certain substances especially sublingually and on the ventral surface of the tongue

42
Q

Enamel

A

hardest structure in the body- 95% calcified (hydroxyapatite) *Produced by ameloblasts, but they degenerate during tooth eruption so the enamel part of the tooth cannot repair itself Lie down enamel in layers that form Lines of Retzius

43
Q

Epithelium of Parotid, Submandibular, and Sublingual glands

A

Parotid= All serous Submandibular= Mostly serous with some mucous Sublingual= Mostly mucous with some serous

44
Q

Filiform Papillae

A

most numerous lingual papillae- keratinized, do not have taste buds

45
Q

Fungiform Papillae

A

look like mushrooms, interspersed especially near tip of tongue, contain a few taste buds

46
Q

Glands of Von Ebner (TEST Question!)

A

located below the circumvallate papillae- deliver serous secretions into the moat for cleansing

47
Q

How many deciduous (baby/milk) teeth are there?

A

20

48
Q

Intercalated Duct prevalence in Parotid, Submandibular, and Sublingual glands

A

Parotid- Abundant Submandibular- Less prominent Sublingual- Absenet

49
Q

Interstitial fat prevalence in Parotid, Submandibular, and Sublingual glands

A

Parotid- Abundant Submandibular- few or no fat Sublingual- no fat

50
Q

Lingual Papillae

A

Filiform Fungiform Circumvallate

51
Q

Lining of the nasopharynx

A

Pseudostratified ciliated columnar epithelium

52
Q

Lining of the oropharynx

A

Nonkeratinized stratified squamous epithelium

53
Q

Minor Salivary Glands

A

*Primarily mucous secreting glands *Located in the submucosa of the oral epithelium *Not encapsulated, short ducts, continuous secretion

54
Q

Mucous cells of salivary glands

A

*Usually cells are bleached out *Nuclei flatted, located on basal surface *secretion contains mucin for lubrication

55
Q

Myoepithelial cells

A

cells in salivary glands that can facilitate the movement of saliva by contract and squeeze the contents of the cells into the lumen

56
Q

Number and type of permanant teeth

A

*Incisors = 8 (single root) *Canine = 4 (single root) *Premolars = 8 (double root) *Molars = 12 (two or three roots)

57
Q

Only location in the body where we have skeletal muscle traveling in three different planes

A

The tongue

58
Q

Parotid Gland

A

Produces 25% of saliva *Largest salivary gland - serous type (compound alveolar) *Lots of IgA secreting plasma cells *Opens on inner surface of cheek across from upper second molars

59
Q

Periodontal Ligament

A

Dence CT which sends fibers into cementum which secure tooth to bony socket - acts as shock absorber and allows limited movement of tooth in socket

60
Q

Regions of a tooth

A

Crown- enamel covered part that extends above the gingival Root- Cementum covered part below the gingival that anchors teeth in the alveolar socket Neck- cemento-enamel junction

61
Q

Salivary control: Parasympathetic vs Sympathetic

A

Sympathetic stimulation: thick, viscoid secretion (dry mouth) Parasympathetic stimulation: copious watery secretions

62
Q

Semi demilune

A

occur when there is a mixture of serous and mucous cells

63
Q

Serous cells of salivary glands

A

*Stain dark *Nuclei are round, in a central position, have abundant zymogen granules *Will cluster together to form acinus (grape like cluster) *Secretion rich in water, electrolytes, amylase, IgA, and lactoferrin

64
Q

Sharpey’s Fibers

A

attach the cementum to the periodontal ligaments

gives tooth some mobility so that trauma does not always knock teeth out

65
Q

Steps in Teeth Formation

A

1) Tooth formation begins 6-7 weeks of gestation 2) Crown formation begins before root formation 3) Root formation occurs after crown is mostly completed and is accompanied by tooth eruption

66
Q

Striated Duct prevalence in Parotid, Submandibular, and Sublingual glands

A

Parotid- Abundant Submandibular- Abundant Sublingual- Absent

67
Q

Striated Ducts

A

special ducts lined with mitochondria, columnar cells, and basal foldings that can modify the primary secretion through active transport

68
Q

Stroma of Parotid, Submandibular, and Sublingual glands

A

Parotid= heavy capsule Submandibular= less prominent capsule Sublingual= no capsule

69
Q

Sublingual Glands

A

Produce 5% of saliva *Smallest of the glands *Mixed type (has serous demilunes) but mucous predominates (rich mucin)

70
Q

Submandibular glands

A

Produce 70% of saliva *Mixed type (serous predominate) with serous demilunes

71
Q

Sulcus terminalis

A

V-shaped shallow groove separating palatine and pharyngeal portions

72
Q

Tissue of the gingival sulcus

A

space between the free gingival and crown- lined by non-keratinized epithelium

73
Q

Type of Excretory Duct in Parotid, Submandibular, and Sublingual glands

A

Parotid- Stenson’s Submandibular- Wharton’s Sublingual- Bartholin’s

74
Q

Vermillion zone

A

red area of the lips *Transition between keratinized and nonkeratinized epithelium. Abundant dermal capillaries, no hair or sweat glands

75
Q

Where are taste buds located throughout the mouth?

A

*Tongue, soft palate (including uvula), pharyngeal wall, epiglottis, and larynx *Some may be found in lips, cheeks, upper third of esophagus. Number decreases with age

76
Q

Where is the largest concentration of taste buds?

A

In the moat of the circumvallate papillae

77
Q

lips

characteristics

exam question!!

A

no hair or sweat glands! (exam ?)

stratum corneoum is thinner and stratum lucidum is thicker. That is why you see blood in lips from dermal papilla

78
Q

keritinized areas in mouth

A

hard palate

gums

surface of tongue

(all involved in mastication

79
Q

portion under the tongue are very _____

clinical relevant because_____

A

porous

drug delivery (nitroglycerine)

80
Q

dental sac gives rise to

A

periodontal ligament and cementin

81
Q

enamel organ gives rise to

the dental papilla gives rise to

A

enamel

82
Q

the dental papilla gives rise to

A

dentin

83
Q
A

HNSS (17 decks)

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