pharynx (respiratory tract) Flashcards
what 3 sections is the pharynx divided into
nasopharynx
oropharynx
laryngopharynx
pharynx relationship to other areas
posterior to nasal, oral and laryngeal cavities
boundaries of nasopharynx - anterior?
posterior nares
boundaries of nasopharynx - superior
sphenoid and occipital bones
boundaries of nasopharynx - posterior
pharyngeal constrictor muscles, retropharyngeal space
boundaries of nasopharynx - lateral
mucosal wall
boundaries of nasopharynx - inferior
soft palate
boundaries of oropharynx - superior
soft palate
boundaries of oropharynx - inferior
upper margin of epiglottis
boundaries of oropharynx - anterior
continuous with oral cavity
boundaries of oropharynx - posterior
pharyngeal constrictor muscles
boundaries of oropharynx - lateral
tonsils, mucosal wall
boundaries of laryngopharynx - superior
upper margin of epiglottis
boundaries of laryngopharynx - inferior
6th cervical vertebrae
boundaries of laryngopharynx - anterior
continuous with larynx
boundaries of laryngopharynx - posterior
pharyngeal constrictor muscles
boundaries of laryngopharynx - lateral
mucosal wall
2 types of muscles of the pharynx
constrictor muscles, longitudinal muscles
3 constrictor muscles of pharynx
superior, middle, inferior
function of constrictor muscles in pharynx
involved in swallowing, coughing.
narrow size of pharynx
what do constrictor muscles of pharynx attach to
pharyngeal raphe
3 longitudinal muscles of pharynx
stylopharyngeus
salpingopharyngeus
palatopharyngeus
innervation of pharynx - sensory
trigeminal nerve (CNV2)
pharyngeal plexus - CN9 (glossopharyngeal) and CN10 (vagus)
innervation of pharynx - motor
CN10 for all but stylopharyngeus which is CN9
4 functions of pharynx
passageway
warms and humidifies air (nasopharynx lined with respiratory epithelium)
protection from infection (lymphoid tissue in tonsils)
speech
