exam 3 Flashcards
what is the pharynx
vertically oriented tube from cranial base to inferior border of-cricoid cartilage
three parts of the pharynx
nasopharynx
oropharynx
laryngopharynx
oropharynx location
from soft palate to superior border of epiglottis
oropharynx contains _____
faucial pillars
________ __________ lie between anterior and posterior faucial pillars of the oropharynx
palatine tonsils
where is the nasopharynx
posterior extension of nasal cavity
______ contains the pharyngeal tonsils (aka adenoids)
nasopharynx
_______ contains torus tubarius (aka eustachian tube opening)
nasopharynx
where is the laryngopharynx
from superior border of epiglottis to base of cricoid cartilage
_______ communicates with the larynx at aditus laryngis
laryngopharynx
______ contains the pyriform sinuses
laryngopharynx
pharyngeal tube (3 parts)
mucosal layer
fascial layer
muscle layer
- circular & longitudinal
muscles of the pharynx (7)
superior constrictor
middle constrictor
inferior constrictor
cricopharyngeus
stylopharyngeus
salpingopharyngeus
palatopharyngeus
superior constrictor action
may contribute to velopharyngeal closure
constrict pharyngeal wall during swallow
superior constrictor forms…
nasopharyngeal and upper oropharyngeal
walls
constrictor muscles weakest to strongest
superior constrictor
medial constrictor
inferior constrictor
middle constrictor action
modify diameter of pharynx
middle constrictor shape
fan shaped
inferior constrictor action
modify diameter of pharynx
contribute to upper esophageal sphincter
(see cricopharyngeus)
cricopharyngeus action
open and close upper esophageal sphincter (w/ inferior constrictor)
cricopharyngeus is part of the ________
inferior constrictor
stylopharyngeus action
elevate and dilate the pharynx
assists in elevating the larynx
salpingopharyngeus action
elevate and dilate pharynx
what muscles elevate and dilate the pharynx (2)
salpingopharyngeus
stylopharyngeus
what muscles open and close upper esophageal sphincter (2)
cricopharyngeus and inferior constrictor
what muscles modify diameter of pharynx (5)
middle constrictor
inferior constrictor
stylopharyngeus
salpingopharyngeus
palatopharyngeus
superficial fascia on neck surrounds the ______
platysma muscle
- veins in neck when you tense
deep fascia allows ______ to move up and down
trachea
danger space is in between
alar fascia and prevertebral fascia
danger space is dangerous because…
infection can spread from skull base to the way to mediastinum
major arteries in neck (5)
R & L subclavian
R & L common carotid
brachiocephalic (middle)
common carotids branch into…
internal & external carotids
what are the major source of blood supply for the brain
internal carotids
______ ______ come from the subclavians
vertebral arteries
vertebral arteries become ______ at junction of medulla and pons
basilar artery
major neck veins (6)
R & L brachiocephalic
superior vena cava
internal jugular
external jugular
subclavian
right and left brachiocephalic join together to form ______
superior vena cava
external jugular drains
face and scalp
internal jugular drains
brain, anterior face, deep muscles
Important neck nerves 2
CN 10 - vagus
phrenic
neck glands (3)
submandibular
thyroid
parathyroid
neck nodes (2)
submandibular
cervical
larynx main role is _______ (3)
PROTECTIVE
1. prevent air from escaping lungs
2. prevent foreign substances from entering lungs
3. expel foreign substances threatening trachea
larynx also is a ______ when not performing a biological role
sound generator (vocal cords)
hyolaryngeal elevation does what
protects airway as we swallow
what is hyoid bone attached to
no other bone
held in place by muscles and ligaments
What suspends the larynx
Hyoid bone
where is hyoid bone located
in neck at level C3
three parts of hyoid bone
body
greater cornu (2)
lesser cornu (2)
thyroid cartilage parts (7)
lamina (body)
superior and inferior cornu
facets (2)
notch
prominence