NASAL CAVITYAND PARANASAL AIR SINUSES Flashcards
maxillary sinus shape base floor roof
- pyramid
- usually medial , apex in zygomatic process of maxilla
- alveolar process of maxilla
- floor of orbit
frontal sinus
regarded as
left and right sinuses seperated
- ant ethmoidal cells that invaded frontal bone postnatally
- septum that is deviated to one side
ethmoid sinus
made up of
walls
small cavities (ethmoid cells) completed by surrounding bone
sphenoid sinus
where is it
superior aspect related to….
lateral…
- body of sphenoid bone
- hypophysis & optic nerve
- cavernous sinus and internal cartoid artery
nasal conchae are lined with
mucus memebrane
middle and superior concha are
medial extensions of ethmoid bone
inferior concha
separate bone attached to lateral wall of maxila
The spheno-ethmoidal recess
location
function
above&post to superior concha
recieves opening of sphenoidal sinus
superior meatus
location
function
under superior concha
recieves opening of post ethmoidal cells and sphenopalatine foramen
the middle meatus
location
function
under middle concha
recieves openings for maxillary and frontal sinuses
most anterior ethmoidal cells
open on an elevation (ethmoidal bulla).
A curved slit (hiatus semilunaris)
location
opening
inferior to bulla
maxillary sinus
The frontal sinus and some anterior ethmoidal cells open either into
extension (ethmoidal infundibulum) of the hiatus
or
ant part of middle meatus
inferior meatus
location
recieves termination of
between inferior concha and palate
nasolacrimal duct
borders of nasal cavity:
superior border
cribiform plate of ethmoid bone
olfactory bulbs
