Lecture 11: Histology of Nasal and Oral Cavities Flashcards Preview

Year 1: 05. Neuro Exam 1 > Lecture 11: Histology of Nasal and Oral Cavities > Flashcards

Flashcards in Lecture 11: Histology of Nasal and Oral Cavities Deck (44)
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1

What are the hallmarks of respiratory epithelium?

  • Ciliated
  • Thick basement membrane
  • Many goblet cells

Pseudostratified Columnar Ciliated Epithelium 

2

What are three regions of the nasal cavities?

Nasal Vesituble: Nostril area

Respiratory Region: Inferior ⅔ 

Olfactory Region: Superior ⅓ 

3

What type of epithelium lines the nasal vestibule?

Keratinized stratified squamous epithelium

4

What are paranasal sinuses?

What is their clinical significance?

  • Extensions of respiratory region of the nasal cavity
  • Communicates with nasal cavities via narrow openings
  • Subject to infections (URI)

5

What are the hallmarks of olfactory mucosa?

  • Lacks Goblet Cells
  • Dramatically thicker than respiratory epithelium
    • Still pseudostratified ciliated columnar
  • Thin Basement Membrane

 

6

What is the function of the olfactory glands?

Serous secretions that dissolve odorant molecules

Make up for lack of mucus from goblet cells

7

What cells have specialized, nonmotile cilia with odorant receptors?

Olfactory Receptor Cells

8

What type of epithelium is found in the oral cavity?

What are the three classifications of this epithelium?

Protective Mucous Membrane: Oral Mucosa

  • Stratified Squamous (w/ varying keratinization)  
    • Masticatory
    • Lining
    • Specialized Mucosa

9

What layer of mucosa in the oral cavity contains the neurovasculature?

Papillary Layer of Lamina Propria

10

If the submucosal layer is present in the oral cavity, what does it contain?

Loose CT

Adipose Tissue

Salivary glands

11

What epithelium makes up the masticatory mucosa?

Keratinized and/or parakeratinized stratified squamous epithelium

-Nuclei highly condensed 

Thin/absent submucosal layer

12

Where can you find masticatory mucosa?

 

Hard palate

Gingiva

Dorsal surface of the tongue

13

What is the purpose of rete ridges and papillae in masticatory mucosa?

Allows mucosa to stay firmly adhered to connective tissue beneath it

14

Where is lining mucosa found?

  • Lips
  • Cheeks
  • Alveolar mucosal surface: where teeth are fixed
  • Floor of mouth
  • Inferior surfaces of the tongue
  • Soft palate

15

What type of oral mucosa would have a distinct submucosa?

Lining mucosa

16

What type of epithelium makes up lining mucosa?

Nonkeratinized stratified squamous, may be parakeratinized in some sections

Quite Thick

17

What are the 3 layers of the epithelium of lining mucosa?

  1. Stratum basale: single layer and regenerates cells
  2. Stratum spinosum: thick layer
  3. Stratum superficiale: surface cells

18

What sense is the oral specialized mucosa associated with?

Taste

19

Where is the oral specialized mucosa located?

Dorsal surface of the tongue

-contains papillae and taste buds

 

20

What type of epithelium makes up oral specialized mucosa?

Keratinized epithelium w/ lamina propria 

21

What lingual papillae do not contain taste buds?

Filiform papillae

22

What is the function of the filiform papillae?

Move food towards pharynx for swallowing

Give dorsal surface of tongue velvety texture

No taste!

23

What structure is this?

Filiform papillae

24

Where are foliate papillae generally found on the tongue?

What does it do?

Posterior lateral regions

Provides taste sensation

25

What structure is this?

Foliate Papillae

26

Where are fungiform papillae generally found on the tongue?

What does it do?

Dorsal Surface

Provides taste sensation

27

What structure is this?

Fungiform Papillae

28

Where can circumvallate papillae be found?

 

  • Few in number but has hundreds of taste buds
  • Location restricted to the posterior part of tongue

29

What structure is this?

Circumvallate Papillae

30

Where else can taste buds be found that is not part of the tongue?

Mucosa

  • Glossopalatine arch
  • Soft palate
  • Posterior surface of epiglottis
  • Posterior wall of pharynx