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Ethmoid Bulla aka Oral Histology Exam 2 > histo and dev of pharyngeal regions > Flashcards

histo and dev of pharyngeal regions Flashcards

1
Q

what are the surfaces of the tongue

A

dorsal and ventral

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2
Q

What are the two dorsal surface divisions of the tongue

A

oral cavity region ant 2/3. pharyngeal region post 1/3

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3
Q

What are the regions of the ventral surfaces f the tongue

A

Oral region ant 2/3

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4
Q

What region of the tongue is mobile

A

Oral region

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5
Q

What epithelium and papilla is on the dorsal surface of the oral part of the tongue

A

SSK w lingual papilla

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6
Q

What is the origin of the dorsal surface of the tongue

A

Ectoderm

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7
Q

What epithelium is on the ventral side of the tongue and what is its origin

A

SSNK and ENDO

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8
Q

What embryonic/developmental origin does the oral region of the tongue develop form

A

Lateral lingual swellings of PA 1

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9
Q

What part of the tongue is fixed

A

Pharyngeal region

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10
Q

In the pharyngeal region of the tongue what epithelium is on the dorsal surface and where was it derived from

A

SSNK and endo

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11
Q

Where is the embryonic origin of the pharyngeal region of the tongue

A

Hypobranchial eminenece

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12
Q

What is the pharynx

A

A muscular tube supported by bone, cartilage, CT, pharyngeal muscles that extends from the base of the skill to cricoid cartilage (C6)

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13
Q

What are the three regions of the pharynx

A

Naso, Oro, laryngopharnynx

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14
Q

Where is the nasopharynx

A

Posterior to the nasa cavity and superior to the soft palate

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15
Q

Where Is oropharynx

A

Posterior to palate gloss Al folds. Region btwn soft palate and epiglottis

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16
Q

Where is the laryngopharynx

A

Below the epiglottis to cricoid cartilage. Sits posterior to larynx and superior to esophagus.

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17
Q

What PAs do the pharynx develop from

A

PA 2,3,4,6 with a small contribution from 1

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18
Q

Is the lining of the pharynx ectoderm or endoderm

A

Endo

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19
Q

What does endoderm form in the lining of the pharynx along the lateral wall of tube

A

Pouches—bilateral outpocketings

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20
Q

What do the endoderm of the developing pharyngeal tube and pouches differentiate into

A

Epithelium which forms the pharyngeal mucosa that varies based on location (naso,oro, laryngo)

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21
Q

What mucosa is location in the three different regions of the pharynx

A

Naso-respiratory
Oro-lining
Laryngo-lining

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22
Q

What differentiates into the epithelium for accessory glands and structures of the pharynx

A

Endoderm from the pharyngeal tube

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23
Q

What are the four tonsils

A

Tubal, pharyngeal, lingual, palatine

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24
Q

What is another name for the tonsils collectively

A

Waldeyers ring

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25
Q

What tonsils are located in the oropharynx

A

Lingua and palaitne

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26
Q

Where are tubal tonsils located

A

Nasopharynx

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27
Q

What are pharyngeal tonsils located

A

Nasopharynx

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28
Q

What are the accessory structures of the pharynx

A

Tonsils, auditory tube, parathyroid, thymu, thyroid

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29
Q

What accessory structures of the pharynx develop in the midline of the pharyngeal tube and not a pouch

A

Pharyngeal tonsils and lingual tonsils

30
Q

Where do all accessory structures of the pharynx (except for two) develop from

A

Walls and pouches of pharynx

31
Q

What PA do the tubal and palatine tonsils develop from

A

Tubal is PA 1 and palatine is PA 2

32
Q

What accessory structures of the pharynx is derived from Pouch PA1

A

Auditory tube

33
Q

What PA is the parathyroid from

A

Pouch PA 3 and 4

34
Q

What PA is the thymus from

A

Pouch PA 3

35
Q

What epithelial cells are in the parathyroid

A

Chief and oxyphil epithelial cells

36
Q

What cells are in the thymus

A

Epithelial reticular cells

37
Q

What cells are in the thyroid

A

Thyroid follicular cells and parafollicular cells

38
Q

What contents are in the nasopharynx

A

Pharyngeal tonsil (PSCC/SSNK) and auditory tube (PSCC)

39
Q

What are the contents of the oropharynx

A

Pharyngeal tongue (post 1/3), lingual tonsils (SSNK), palatine tonsils (SSNK)

40
Q

What are the contents of the laryngopharynx

A

Epiglottis, pyriform recess, larynx that is anterior to laryngopharnx and contains false vocal cords and true

41
Q

What are the epithelium associated with the true and false vocal cords

A

False—PSCC
True—SSNK

42
Q

What is the auditory/eustachian tube

A

Bilateral structure comprised of capital and skeletal muscle covered by mucosa

43
Q

What connects the middle ear to the nasopharynx

A

Auditory tube

44
Q

What epithelium covers the surface of the auditory tube and what origin is it derived rom

A

PSCC and endoderm

45
Q

The auditory tube is covered by what mucosa

A

Respiratory that contains mucous and mixed salivary glands

46
Q

What are the three key features of the auditory tube

A

Torus tubarious, tubal tonsils, skeletal muscle

47
Q

What is a mucosal elevation that lies posterior to the opening of the auditory tube

A

Torus tubarious

48
Q

__________ are bilateral groups of large lymphatic nodules found beneath the epithelium in the lamina propria of the auditory tube

A

Tubal tonsils

49
Q

What are the three muscles associated with the auditory tube and their PA

A

Tensor veil palatini-PA 1
Lavatory veli palatini- PA 4
Salpingopharyngeous- PA 4

50
Q

What is the clinical name for the pharyngeal tonsil

51
Q

What area of the pharyngeal tonsils may contain SSNK as opposed to PSCC

A

Surface closest to the oropharynx

52
Q

What epithelium covers the surface of and lines the deep tonsilar crypts of the palatine tonsils

53
Q

What is the passage form the oral cavity to oropharynx

A

Oropharyngeal isthmus

54
Q

What mucosa and epithelium covers the pharyngeal region of the tongue

A

Lining and SSNK

55
Q

What is associated with the posterior 1/3 of the tongue

A

Minor mucous salivary glands, lingual tonsils, skeletal muscle

56
Q

What epithelium covers the lingual tonsils , mucous glands, and skeletal muscle in post 1/3 of tongue

57
Q

What is a major structure on the posterior 1/3 of the tongue where the thyroid gland originates

A

Foramen cecum

58
Q

What are the two surfaces of the epiglottis and what epithelium are they covered by

A

Oral surface-SSNK
Laryngeal surface-PSCC

59
Q

What is the core of the epiglottis comprised of

A

Elastic cartilage

60
Q

What is the pyriform recess

A

Bilateral depression located in the laryngopharnx on either side of the opening to the larynx that functions in speech

61
Q

What is the epithelium lining the laryngopharnx which included the pyriform recess

62
Q

What is a potential injury site and associated with high pharyngeal cancer (squamous cell carcinoma)

A

Piriform recess

63
Q

What mucosa and epithelium lines the the larynx

A

Respiratory mucosa. And the majority of it is covered by PSCC but SSNK covers the true vocal cords

64
Q

What is the developmental precursor of the false vocal cords

A

Epiglottic swelling

65
Q

What is the adult structure of the false vocal cords

A

Laryngeal mucosa that gives rise to supraglottic and transglottic mucosa

66
Q

What is the developmental precursor of the true vocal cords

A

Aryepiglottic swelling

67
Q

T/F— the false and true vocal cords become the same adult structures

68
Q

What is the PA derivative of the true and false vocal cords

A

False- PA4 midline floor of it
True-PA6 midline floor of it

69
Q

What swellings are PA derivatives form the midline pharyngeal floor

A

Epiglottic and aryepiglottic

70
Q

What structures does the aryepiglotic swelling form in the larynx

A

Cricoid cartilage, cuneiform,corniculate, arytenoid cartilage

Ethmoid Bulla aka Oral Histology Exam 2 (7 decks)

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