nose and sinus anatomy Flashcards
what is the side of the nose called?
ala
what is the bit between the nostrils called?
septum
bones of the nasal cavities?
nasal bone vomer maxilla inferior nasal conchae perpendicular plate of ethmoid bone
what wall of the nasal cavity do these make?
conchae, nasal bone, maxilla, palantine bone, pterygoid plate of spehnoid
lateral wall
what wall of the nasal cavity do these make?
septal cartilage, vomer
perpendicular plate of ethmoid?
medial
what type of mucosa is at the very front on the nose//
karatinised stratified squamous epthelium
what type of mucosa makes up the middle part and posterior inferior end of nasal cavity?
resp epthelium
what type of mucosa is in the most posterior and superior corner of nasal cavity?
olfactory epthithelium
where does the olfactory tract end?
in temporal bone
what nerve supplies sensory to the nasal cavity?
trigeminal (CN V)- opthalamic division top half via anterior/posterior ethmoidal branches of nasociliary nerve
and maxillary bottom half via nasopalantine and greater palantine nerves
opthalmic artery branches from?
internal carotids
facial and maxillary artery branch from?
external carotis
describe blood supply to nasal cavities?
opthalamic artery via anterior and posterior ethmoidal arteries
maxillary artery via sphenopalatine and greater palatine arteries
facial artery via lateral nasal branch of facial or septal branch of superior labial artery
what is Kiesselbachs (little’s) area?
an arterial anastomosis on nasal septum
common site for nosebleeds
how many conchae are there?
3-superior, middle, inferior
what are the meatuses?
spaces underneath the conchae-superior, middle and inferior
what is the sphenoethmoidal recess?
a space behind the superior conchae
name the paranasal sinuses?
frontal x2
maxillary x2
ethmoidal air cells x2
sphenoidal (1 or 2)
where does the frontal sinus drain to?
middle meatus
where does maxillary sinus drain to?
middle meatus
where do the ethmoidal air cells drain to?
superior and middle meatuses
where does the sphenoidal sinus drain to?
sphenoethmoidal recess
what is lacrimal fluid?
tears
what does the lacrimal gland produce?
lacrimal fluid -tears
where does lacrimal fluid drain to?
nasolacrimal duct then to INFERIOR meatus
which sinus is predisposed to inflammation?
maxillary
can maxillary sinusitis present as toothache?
yes
