nasal cavity Flashcards
what divides the right and left compartments of the nasal cavity
nasal septum
anterior apertures
nares / nostrils
posterior apertures
choanae
lateral boundaries of nostrils
alae (wings)
what combine to form the nasal septum
perpendicular plate of ethmoid bone, vomer, septal cartilage
what types of tissue is the nose made up of
cartilage and fibroareolar tissue
nasal vestibules
small space internal to the nares
3 regions of the nasal cavity
- nasal vestibules
- respiratory region
- olfactory region
function of respiratory region
warm and moisten air passing over the area
what separates the nasal cavity superiorly from the anterior cranial fossa
cribriform plate
what extends from the olfactory bulb through the cribriform plates
olfactory nerve fibers
-innervate the mucosa of the roof of the nasal cavity
partition between mouth and nose
hard palate
what lies posterior to nasal cavity
nasopharynx
what is lateral to nasal cavity
upper half: ethmoidal air cells
lower half: maxillary sinuses
anterior 2/3 of nasal cavity
palatine process of MAXILLA
posterior 1/3 of nasal cavity
horizontal plate of PALATINE
3 bones that articulate with nasal cavity at the roof
frontal
ethmoid
sphenoid
what makes up the nasal septum
ethmoid, vomer, and cartilage
function of conchae
increase SA of contact between tissues of lateral wall and respired air for HEAT EXCHANGE
largest concha
inferior conchae
4 air channels in the nasal cavity
- spheno-ethmoidal recess
- superior meatus
- middle meatus
- inferior meatus
maxillary sinus boundaries
roof: floor of orbit
floor: alveolar process of maxilla
base: lateral wall of nose
apex: zygomatic bone
posterior wall: infratemporal fossa
what lies superior to sphenoidal sinus
cranial cavity (pituitary gland and optic chiasm)
what lies lateral to sphenoidal sinus
cranial cavity (cavernous sinus)
what drains into infundibulum
frontal sinus and anterior ethmoidal cells
where does middle ethmoidal cells drain into
ethmoidal bulla
where does posterior ethmoidal cells drain into
superior meatus
where does sphenoidal sinus drain into
spheno-ethmoidal recess
where does maxillary sinus drain into
semilunar hiatus
tears drain by what into what
tears drain through the nasolacrimal duct and into the inferior meatus
where does the nasolacrimal duct drain into
inferior meatus
function of olfactory nerve
special sensation (smell)
anterior ethmoidal nerve is a branch of what cn
Cn V1
anterior ethmoidal n supplies
skin of dorsum and ala of nose
does the posterior ethmoidal n supply the nasal cavity
nope
top and bottom parts of the nasal cavity are supplied by what cn
top: cn v1
bottom: cn v2
nasal nerves enter the nasal cavity by
the sphenopalatine foramen
posterior superior lateral nasal nn supply
lateral wall of nasal cavity
posterior superior medial nasal nn supply
- roof of nasal cavity
- nasal septum
nasopalatine n is a branch of
posterior superior medial nasal nn
nasopalatine n supplies
nasal branches: nasal septum
palatal branches: palatal mucosa and gingiva anterior to max canines
posterior inferior lateral nasal nn are branches of what
greater palatine n
posterior inferior lateral nasal nn supply
lateral and inferior wall of nasal cavity
internal nasal branch (of intra orbital n) supplies
skin of vestibule and movable part of the nasal septum
nasal branch of anterior superior alveolar n supplies
lateral wall near the anterior end of inferior concha
parasympathetic innervation of nasal cavity (to the glands)
pre: greater petrosal n (CN7)
synapses: PP ganglion
post: join branches of CN V-2
sympathetic innervation of nasal cavity
- post: superior cervical ganglion (T1)
- ICA
- deep petrosal n
- joins greater petrosal to make nerve of the pterygoid canal
what innervates frontal sinuses
supraorbital n (CN V1)
what innervates ethmoidal cells
- anterior and posterior ethmoidal nn (from nasocillary n – branch of CNV1)
- orbital branches from PP ganglion (max n)
what innervates maxillary sinus
posterior, middle, and anterior superior alveolar nn (max n)
what innervates sphenoidal sinus
- posterior ethmoidal n (CN V1)
- orbital branches of PP ganglion (max n)
sphenopalatine a is companion with what n
nasal branches (PSL and PSM nn)
sphenopalatine a is a branch of
maxillary a
sphenopalatine a passes through
sphenopalatine foramen
branches of sphenopalatine a
- Posterior lateral nasal branches
- posterior septal branches (branches into nasopalatine a)
posterior lateral nasal branches supply
most of the lateral wall of nasal cavity
nasopalatine a (branch of posterior septal branches) supplies
palatal gingiva and mucosa from central incisor to canine
branches of facial a
- superior labial a
- lateral nasal a
septal branch (superior labial a) of facial a supplies
anterior nasal septum
lateral nasal branch of facial a supplies
dorsum, ala, and nasal vestibule
anterior and posterior ethmoidal aa branch from
ophthlamic a
veins of the nasal cavity drain into
pterygoid plexus in IT fossa
veins of anterior-inferior regions of nasal cavity drain into
facial vein
superior nasal cavity veins may also drain into
superior saggital sinus via foramen cecum
anterior and posterior ethmoidal veins drain into
cavernous sinus via superior orbital v
blood supply to frontal sinus
anterior ethmoidal a
blood supply to ethmoidal cells
anterior and posterior ethmoidal a
blood supply to maxillary sinus
posterior and anterior superior alveolar a (NOT MIDDLE)
blood supply to sphenoidal sinus
posterior ethmoidal a
-PHARYNGEAL A
