histo and dev of pharyngeal regions Flashcards
what are the surfaces of the tongue
dorsal and ventral
What are the two dorsal surface divisions of the tongue
oral cavity region ant 2/3. pharyngeal region post 1/3
What are the regions of the ventral surfaces f the tongue
Oral region ant 2/3
What region of the tongue is mobile
Oral region
What epithelium and papilla is on the dorsal surface of the oral part of the tongue
SSK w lingual papilla
What is the origin of the dorsal surface of the tongue
Ectoderm
What epithelium is on the ventral side of the tongue and what is its origin
SSNK and ENDO
What embryonic/developmental origin does the oral region of the tongue develop form
Lateral lingual swellings of PA 1
What part of the tongue is fixed
Pharyngeal region
In the pharyngeal region of the tongue what epithelium is on the dorsal surface and where was it derived from
SSNK and endo
Where is the embryonic origin of the pharyngeal region of the tongue
Hypobranchial eminenece
What is the pharynx
A muscular tube supported by bone, cartilage, CT, pharyngeal muscles that extends from the base of the skill to cricoid cartilage (C6)
What are the three regions of the pharynx
Naso, Oro, laryngopharnynx
Where is the nasopharynx
Posterior to the nasa cavity and superior to the soft palate
Where Is oropharynx
Posterior to palate gloss Al folds. Region btwn soft palate and epiglottis
Where is the laryngopharynx
Below the epiglottis to cricoid cartilage. Sits posterior to larynx and superior to esophagus.
What PAs do the pharynx develop from
PA 2,3,4,6 with a small contribution from 1
Is the lining of the pharynx ectoderm or endoderm
Endo
What does endoderm form in the lining of the pharynx along the lateral wall of tube
Pouches—bilateral outpocketings
What do the endoderm of the developing pharyngeal tube and pouches differentiate into
Epithelium which forms the pharyngeal mucosa that varies based on location (naso,oro, laryngo)
What mucosa is location in the three different regions of the pharynx
Naso-respiratory
Oro-lining
Laryngo-lining
What differentiates into the epithelium for accessory glands and structures of the pharynx
Endoderm from the pharyngeal tube
What are the four tonsils
Tubal, pharyngeal, lingual, palatine
What is another name for the tonsils collectively
Waldeyers ring
What tonsils are located in the oropharynx
Lingua and palaitne
Where are tubal tonsils located
Nasopharynx
What are pharyngeal tonsils located
Nasopharynx
What are the accessory structures of the pharynx
Tonsils, auditory tube, parathyroid, thymu, thyroid