pharynx and larynx

what are the three parts of the pharynx

naso, oro and laryngo pharynx

location of nasopharynx

from choana to uvula of soft palate

location of oropharynx

from fauces (between oral cavities and oral pharynx) to uvula and hyoid bone

location of laryngo pharynx

from hyoid to cricoid cartilage

components of naso-pharynx

it lies posterior to the nasal cavity and contains opening of pharyngotympanic (auditory tube) and pharyngeal tonsil (lymphatic tissue), lined by respiartory epithelium

role of nasopharynx

passage way for air

components of oro-pharynx

palatine tonsil, lingual tonsil and epiglottis, lines by stratified squamos epithelium (same as oral cavity, which it is posterior to )

role of oropharynx

passage for both are and food

role of epiglottis

blocks food

laryngopharynx components

it is posterior to the larynx, and contains the opening to the larynx (voice box), it is lined by stratified squamos epethelium

role of laryngopharynx

passage for air and food

role of larynx

passage for air and vocalization

glottis

larynx opening (sensory receptors live here)

rima glottidis

“rim around the glottis” or the ring shape

vestibule

entrance of the larynx

vestibular fold or false vocal cord

there for protection of vocal cord

vocal fold or true vocal cord

sound production

what epithetlium is from glottis to vocal fold

stratified squamous epithelium

what epethelim is inferior to vocal fold

respiratory epithelium

where does the larynx become the trachae

at the cricoid cartilage

four cartilage in larynx

all hyaline; thyroid, arytenoid, cricoid and corniculate

thyroid cartilage

shield shape

arytenoid cartilage

resembles a pitcher

cricoid cartilage

ring shaped

corniculate cartilage

horn shaped

where is the vocal ligament stretch

from the thyroid to arytenoid cartilages

what are vocal cords made of

vocal ligament and mucosa (fold)

vagus nerve role in larynx

motor innervation to muscles of vocalizaiton, sensory to larynx