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24 terms

Respiratory-the pharynx

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The pharynx connects what?
the nasal cavity and mouth superiorly to the larynx and esophagus inferiorly
What is the pharynx commonly called?
the throat
The pharynx extends to where?
about 5 inches from the base of the skull, to the level of the 6th cervical vertabra
What are the three regions the pharynx is divided into?
the nasopharynx, oropharynx, laryngopharynx
The muscular pharynx wall is composed of what?
skeletal muscle
why does the nasopharynx serve only as an air passageway?
Because it lies above the point where food enters the body
what closes off the nasopharynx and prevents food from entering the nasal cavity?
The soft palate and its pendulous uvula move superiorly
the nasopharynx is continuous with what?
the nasal cavity through the posterior nasal apertures
What is another name for pharyngeal tonsil?
Adenoids
What is the job of the pharyngeal tonsil(adenoid)?
trap and destroy pathogens entering the nasopharynx in air
Infected and swollen adenoids block air passage in the nasopharynx and make it necessary to do what?
breathe through the mouth.
when the adenoids are chronically enlarged what may be disturbed?
speech and sleep
What do the pharyngotympanic (auditory)tubes do?
drain the middle ear cavities and allow middle ear pressure to equalize with atmospheric pressure
A ridge of pharyngeal mucosa also referred to as what?
tubal tonsil
Because of the strategic location of the tubal tonsils what do they help protect?
the middle ear against infections likely to spread from the nasopharynx.
What also plays a protective role of the middle ear?
pharyngeal tonsil, superoposterior and medial to the tubal tonsils
The oropharynx is continuous with the oral cavity through what?
an archway called isthmus of the fauces
What passes through the oropharynx?
Food and air
What kind of tissue does the oropharynx have?
stratified squamous epithelium
The structural accommodation of the tissue change of the oropharynx helps with what?
increased friction and greater chemical trauma accompanying food passage
What are the two kinds of tonsils embedded in the oropharyngeal mucosa?
palatine tonsils and lingual tonsils
The laryngopharynx serves as a passage way for what?
food and air
What type of tissue does laryngopharynx have?
stratified squamous epithelium
During swallowing what has the right of way?
food, air passage temporarily stops