Respiratory II Flashcards
3 portions of respiratory system
air conducting = conditions inspired air
respiratory = gas exchange
ventilation = insp/exp thoracic cage
air conduction portion
warmed by venous plexus and hoisted by secretions of seromucous glands in GOBLET cells
nasal conchae
turbulence to help warm and moisten air
pharynx, where does it begin and end
begin: base of skull
end: inferior cricoid cartilage C6
3 parts of pharynx
nasopharynx
oropharynx
laryngopharynx
larynx
anterior neck, windpipe
functions of larynx
phonation, cough reflex, protect lower respiratory tract
3 parts of larynx
supra glottis
glottis
subglottis
supra glottis
epiglottis to false VC (vestibular folds)
glottis
VCs and 1cm below
rima glottidis
opening between VCs
subglottis
inferior glottis to inferior cricoid cartilage
epiglottis
flap of cartilage behind tongue, at top of larynx
clinical relevance of larynx
emergency intubation, apply cricoid pressure to cricoid of larynx to occlude esophagus and prevent regurgitation of gastric contents
laryngeal muscles
phonation and breathing
3 UNPAIRED cartilages
epi, thy, cri
3 paired cartilages
arytenoid
corniculate
cuneiform
is the larynx continuous with the trachea?
yes, opens superiorly into trachea
cricothyroid muscle: innervated by what
external laryngeal nerve (CN X)
posterior cricoarytenoid muscle
abducts vocal folds, sole opener of vocal folds
clinical relevance = vocal cord paralysis. what is the movement of VC controlled by?
what is it innervated by?
movement of VC is controlled by intrinsic muscles of larynx
innervated by: RECURRENT LARYNGEAL NERVE
(motor innervation to all laryngeal except cricothyroid)