Nasal Cavity Flashcards
what are the 3 division of the nasal cavity?
- vestibule
- respiratory region
- olfactory region
conchae
curved shelves of bone that project out of the lateral walls of the nasal cavity
how many conchae are there in the nose?
3 - inferior, middle, superior
what are the 4 pathways of air flow in the nose?
inferior meatus
middle meatus
superior meatus
shpeno-ethmoidal recess
where does the inferior meatus lie?
between inferior concha and floor of nasal cavity
where does the middle meatus lie?
between inferior and middle concha
where does the superior meatus lie?
between middle and superior concha
where does the spheno-ethmoidal recess lie?
superiorly and posteriorly to superior concha
what is the purpose of th conchae?
- increase the surface area of the nasal cavity
- increases amount of air inspired
- disrupt laminor flow of air
the location of the paranasal sinuses opening is marked by what?
semilunar hiatus
where do the middle ethmoidal sinuses empty?
ethmoidal bulla
where do the posterior ethmoidal sinuses open?
level of superior meatus
what is the only structure that does not empty out onto the lateral walls of the nasal cavity, and instead opens onto the posterior roof?
sphenoid sinus
in addition to the paranasal sinuses, what two other structures drain into the nasal cavity?
nasolacrimal duct
auditory/Eustachina tube
what bones contribute to the internal nasal septum?
- nasal, maxillary, palatine - paired
- ethmoid, vomer - unpaired
label the arterial supply to the nose
Label the concha and meatus
Label the innervation of the septum
Label the openings found on the llateral wall of the nose
Label the bones of the septum
