10 - nasal cavity and paranasal air sinuses Flashcards
which type of epithelium forms respiratory mucosa which lines most of nasal cavity?
ciliated pseudostratified columnar epithelium
what does the olfactory mucosa line?
the roof of the nasal cavity
which plate do axons of CN I pass through to enter the cranial cavity?
cribriform plate of ethmoid
name the 3 conchae of the nasal cavity?
superior meatus
middle meatus
inferior meatus
what is the space above the superior concha?
sphenoethmoidal recess
what bone is the inferior concha part of?
maxilla
what bone are the middle and superior concha part of?
ethmoid
arterial supply of the nose?
branches of ophthalmic a. and ECA
venous drainage of nose?
venous plexus
CLINICAL -
what is the possible consequence of rich vascular supply of the nose?
nose bleeds
what are the paranasal air sinuses?
group of air filled spaces in nasal cavity
3 functions of the paranasal air sinuses?
decrease weight of skull
vocal resonance
buffer for trauma
what does the sphenoid-ethmoid recess open into?
sphenoidal sinus
what does the superior meatus open into?
posterior ethmoidal air cells
what does the middle meatus open into?
frontal sinus
maxillary sinus …………………..
what does the inferior meatus open into?
nasal lacrimal duct
CLINICAL -
what can sinusitis result in?
blockage of the sinus opening into the nasal cavity and so severe pain of sinus
CLINICAL -
which nerve carries the pain caused by sinusitis?
branches of trigeminal n (CN V)
what innervates the frontal air sinus?
ophthalmic (CN V1)
what innervates the maxillary air sinus?
maxillary (CN V2)
what innervates the sphenoid air sinus?
ophthalmic and maxillary (CN V 1+2)
what innervates the ethmoidal air sinus?
ophthalmic (CN V1)
which 2 bones form the roof of the nasopharynx?
occipital
sphenoid
2 important structures which lie in the nasopharynx?
adenoids
Eustachian tube
