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Flashcards in Pharynx and Larynx Deck (21):
1

structures pharynx is continuous with

nasal and oral cavities (superiorly)
esophagus at level C6

2

3 parts of pharynx

nasopharynx
oropharynx
laryngopharynx

3

location of nasopharynx

behind nose and above soft palate

4

openings into nasopharynx

posterior nasal aperture
nasopharyngeal isthmus
auditory tube

5

structures in lateral wall of nasopharynx

pharyngeal opening of auditory tube
torus tubarius
salpingopharyngeal fold
pharyngeal recess

6

what bony landmark roughly marks the transition between middle and inferior pharyngeal constrictors

greater cornu of hyoid bone

7

what structure indicates the transition of inferior pharyngeal constrictor to esophagus

recurrent laryngeal nerve running between trachea and esophagus

8

location of oropharynx

behind oral cavity

9

openings into oropharynx

oropharyngeal isthmus
nasopharyngeal isthmus
laryngopharynx (level of epiglottis)

10

structures of lateral wall of oropharynx

palatoglossal arch (containing palatoglossus muscles)
palatopharyngeal arch

11

location of laryngopharynx

behind larynx
extends from upper border of epiglottis to lower border of cricoid cartilage

12

layers of pharynx (deep --> superficial)

pharyngobasilar fascia
muscular coat
buccopharyngeal fascia

13

circular muscles of the pharynx

superior, middle, and inferior pharyngeal constrictors

14

longitudinal muscles of the pharynx

stylopharyngeus
palatopharyngeus
salpingopharyngeus

15

muscles of the pharynx innervated by

vagus nerve
except stylopharyngeus- glossopharyngeal N

16

piriform fossa

divots next to larynx, often where food can get stuck and cause choking

17

1st stage of deglutition

voluntary
-styloglossus elevates tongue and pushes food to oropharyngeal isthmus
-palatoglossus and palatopharyngeus push food backward into oropharynx
-tensor veli paletini and levator veli paletini elevate soft palate to close off nasopharynx

18

2nd stage of deglutition

-involuntary
-palatopharyngeus, stylopharyngeus, and salpingopharyngeus elevate pharynx to receive food
-suprahyoid muscle elevates hyoid and larynx to close larynx with epiglottis

19

3rd stage of deglutition

-involuntary
-constriction of pharyngeal constrictors passes food to esophagus
-once in esophagus, peristalsis takes over

20

larynx lies in front of which vertebral level

C3-6

21

motor innervation to muscles of larynx

all innervated by recurrent laryngeal
except cricothyroid- external laryngeal