Pharynx

Question 1

extend of pharynx

Answer 1

base of skull to inf boreder of cricoid cartilage (C6)

Question 2

what orientation of muscle fibers does the pharynx have

Answer 2

circular and longitudinal

Question 3

nasal cavity -> ___ -> nasopharynx

Answer 3

choanae

Question 4

oral cavity -> ___ -> oropharynx

Answer 4

pharyngeal isthmus starts at palatoglossal arch

Question 5

larynx -> ___ -> laryngopharynx

Answer 5

laryngeal inlet

Question 6

what is the posterior attachment of the pahrynx

Answer 6

pharyngeal tubercle

Question 7

what is the attachment for superior pharyngeal constrictor m and buccinator m

Answer 7

pterygomandibular raphe

Question 8

5 layers of pharynx

Answer 8

1. mucosa (mucous mem)
2. submucosa
3. pharyngobasilar fascia
4. muscular layer (3 long mm and 3 constrictor mm)
5. buccopharyngeal fascia

Question 9

structures from nasopharynx to esophagus

Answer 9

nasopharynx
softpalate
oropharynx
epiglottis
laryngopharynx
C6
esophagus

Question 10

nasopharynx structures

Answer 10

auditory tube: connection btwn pharynx and middle ear
torus tubarius: post to auditory tube, cartilage
pharyngeal recess: post to TT, groove along lat pharyngeal wall
pharyngeal tonsil: post sup to TT
salpingopharyngeal fold: mucous mem covering m

Question 11

oropharynx structures

Answer 11

valecula: fold at base of tongue ant to epiglottis (pocket=glossoepiglotic fold)
palatopharyngeal sphincter: on deep surface of sup constrictor m (serves as seal that contracts in and seals soft palate)

Question 12

lateral extension of valecula

Answer 12

piriform recess (keeps liquid out of larynx, things can get caught here

Question 13

laryngopharynx structures

Answer 13

epiglottis, laryngeal cartilages
piriform recess: extends lat to thyroid cart
internal laryngeal n: descends beneath mucous mem
sup laryngeal vessels: run w/ internal laryngeal n
recurrent lar n: ascend beneath mucous mem
inf laryngeal vessels: run w/ recurrent laryngeal n

Question 14

what brs does superior laryngeal n give

Answer 14

internal laryngeal n: sensory to larynx (passes thru thyrohyoid mem)
external laryngeal mem: motor to cricothyroid m

Question 15

how does right recurrent laryngeal n course and what brs does it give

Answer 15

loops under R subclavian and gives inferior laryngeal n

Question 16

what does internal laryngeal n run with

Answer 16

superior laryngeal artery

Question 17

what mm intergiditate inferiorly to elevate pharynx and allow swallowing

Answer 17

salpingopharyngeus m
palatopharyngeus m
stylopharyngeous m

Question 18

what are lat attachments for inferior pharyngeal constrictor mm

Answer 18

thyroid and cricoid cartilages

Question 19

what closes gap btwn mm and cranial base

Answer 19

pharyngeal fascia

Question 20

arterial supply of pharynx

Answer 20

mainly ascending pharyngeal and superior thyroid aa (brs of ECA)
also brs of facial and maxillary aa, and inf thyroid a pharyngeal brs

Question 21

arterial supply of palatine tonsils

Answer 21

tonsilar brs of lingual and facial aa (brs of ECA)
ascending pharyngeal a (br of ECA)
tonsillar br of ascending palatine a (br of ECA)
lesser palatine a (br of ECA)

Question 22

pharyngeal innervation

Answer 22

via pharyngeal plexus of nn

1. SCSG
2. CN X (motor to mm)
3. CN IX (motor to stylopharyngeus m and sensory to pharynx)

Question 23

structure of pharyngeal tonsils

Answer 23

lymphoid tissue (filters oro/nasopharynx)