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
What tonsils are located in the oropharynx
Lingua and palaitne
26
Where are tubal tonsils located
Nasopharynx
27
What are pharyngeal tonsils located
Nasopharynx
28
What are the accessory structures of the pharynx
Tonsils, auditory tube, parathyroid, thymu, thyroid
29
What accessory structures of the pharynx develop in the midline of the pharyngeal tube and not a pouch
Pharyngeal tonsils and lingual tonsils
30
Where do all accessory structures of the pharynx (except for two) develop from
Walls and pouches of pharynx
31
What PA do the tubal and palatine tonsils develop from
Tubal is PA 1 and palatine is PA 2
32
What accessory structures of the pharynx is derived from Pouch PA1
Auditory tube
33
What PA is the parathyroid from
Pouch PA 3 and 4
34
What PA is the thymus from
Pouch PA 3
35
What epithelial cells are in the parathyroid
Chief and oxyphil epithelial cells
36
What cells are in the thymus
Epithelial reticular cells
37
What cells are in the thyroid
Thyroid follicular cells and parafollicular cells
38
What contents are in the nasopharynx
Pharyngeal tonsil (PSCC/SSNK) and auditory tube (PSCC)
39
What are the contents of the oropharynx
Pharyngeal tongue (post 1/3), lingual tonsils (SSNK), palatine tonsils (SSNK)
40
What are the contents of the laryngopharynx
Epiglottis, pyriform recess, larynx that is anterior to laryngopharnx and contains false vocal cords and true
41
What are the epithelium associated with the true and false vocal cords
False—PSCC True—SSNK
42
What is the auditory/eustachian tube
Bilateral structure comprised of capital and skeletal muscle covered by mucosa
43
What connects the middle ear to the nasopharynx
Auditory tube
44
What epithelium covers the surface of the auditory tube and what origin is it derived rom
PSCC and endoderm
45
The auditory tube is covered by what mucosa
Respiratory that contains mucous and mixed salivary glands
46
What are the three key features of the auditory tube
Torus tubarious, tubal tonsils, skeletal muscle
47
What is a mucosal elevation that lies posterior to the opening of the auditory tube
Torus tubarious
48
__________ are bilateral groups of large lymphatic nodules found beneath the epithelium in the lamina propria of the auditory tube
Tubal tonsils
49
What are the three muscles associated with the auditory tube and their PA
Tensor veil palatini-PA 1 Lavatory veli palatini- PA 4 Salpingopharyngeous- PA 4
50
What is the clinical name for the pharyngeal tonsil
Adenoid
51
What area of the pharyngeal tonsils may contain SSNK as opposed to PSCC
Surface closest to the oropharynx
52
What epithelium covers the surface of and lines the deep tonsilar crypts of the palatine tonsils
SSNK
53
What is the passage form the oral cavity to oropharynx
Oropharyngeal isthmus
54
What mucosa and epithelium covers the pharyngeal region of the tongue
Lining and SSNK
55
What is associated with the posterior 1/3 of the tongue
Minor mucous salivary glands, lingual tonsils, skeletal muscle
56
What epithelium covers the lingual tonsils , mucous glands, and skeletal muscle in post 1/3 of tongue
SSNK
57
What is a major structure on the posterior 1/3 of the tongue where the thyroid gland originates
Foramen cecum
58
What are the two surfaces of the epiglottis and what epithelium are they covered by
Oral surface-SSNK Laryngeal surface-PSCC
59
What is the core of the epiglottis comprised of
Elastic cartilage
60
What is the pyriform recess
Bilateral depression located in the laryngopharnx on either side of the opening to the larynx that functions in speech
61
What is the epithelium lining the laryngopharnx which included the pyriform recess
SSNK
62
What is a potential injury site and associated with high pharyngeal cancer (squamous cell carcinoma)
Piriform recess
63
What mucosa and epithelium lines the the larynx
Respiratory mucosa. And the majority of it is covered by PSCC but SSNK covers the true vocal cords
64
What is the developmental precursor of the false vocal cords
Epiglottic swelling
65
What is the adult structure of the false vocal cords
Laryngeal mucosa that gives rise to supraglottic and transglottic mucosa
66
What is the developmental precursor of the true vocal cords
Aryepiglottic swelling
67
T/F— the false and true vocal cords become the same adult structures
TRUE
68
What is the PA derivative of the true and false vocal cords
False- PA4 midline floor of it True-PA6 midline floor of it
69
What swellings are PA derivatives form the midline pharyngeal floor
Epiglottic and aryepiglottic
70
What structures does the aryepiglotic swelling form in the larynx
Cricoid cartilage, cuneiform,corniculate, arytenoid cartilage