nasal cavity Flashcards
what does the nose consist of?
external nose, nasal cavities, divided by a nasal septum
where is the olefactory area found?
superiorly
where is the respiratory area found?
inferior 2/3
what are the boundaries of the nasal cavity?
roof- frontal, ethomoid, sphenoid bones
floor- maxilla, palatine
lateral walls- nasal conchae
what chambers communicate with the nasal cavity?
nasopharynx (posteriorly), paranasal sinuses (superiorly & laterally), lacrimal sac & conjunctiva (superiorly)
what bones form the lateral nasal walls and project medially?
superior, middle, and inferior nasal concha
what does each concha do?
form a roof for a meatus (opening)
what do meati provide?
passageways to the paranasal air sinuses and nasolacrimal duct
paranasal air sinuses
hollow, air-filled cavity in skull lined by mucous membrane
what bones are the paranasal air sinuses located within?
frontal, ethmoid, sphenoid, maxillary
what is the purpose of the paranasal air sinuses?
to warm, moisten, and filter inhaled air, lighten skull and provide resonating chambers for speech
spheno-ethmoidal recess
opening to the sphenoidal sinus
superior meatus
entrance to the posterior ethmoidal sinuses
middle meatus
entrance to the frontal, ethmoidal, maxillary sinuses
inferior meatus
opening of the nasolacrimal duct
