Nasal Cavities and Paranasal Sinuses Flashcards
nasal cavities open on face through what
nostrils/ nares
nasal cavities open posteriorly to nasopharynx through
choanae
what is a vestibule
dilation inside aperture of each nostril
nasal cavity is lined by
skin with hairs
sebaceous glands
sweat glands
whats a meatus
a passageway
whats a conchae
a structure shaped like a shell
(can be part of the ethmoid bone/ a separate bone)
what bones forms the roof of the nasal cavity
nasal
frontal
ethmoid (cribriform plate)
sphenoid (body)
what does the cribriform plate transmit
olfactory nerves
what forms the floor of the nasal cavity
palatine processes of maxillary bones and horizontal plate of palatine bone
what does the floor of the nasal cavity contain
incisive foramen
what does the incisive foramen transmit
nasopalatine nerve
sphenopalatine artery
what forms the medial wall (nasal septum) of the nasal cavity
septal cartilage
perpendicular plate of ethmoid bone
vomer
process of palatine, maxillary, frontal, sphenoid and nasal bones
what forms the lateral wall of the nasal cavity
nasal bone
frontal process and nasal surface of maxilla
lacrimal bone
perpendicular plate of palatine bone
medial pterygoid plate of sphenoid bone
superior and inferior concha of ethmoid bone
what structures are contained on the lateral wall of the nasal cavity
sphenoethmoidal recess
superior meatus
middle meatus
inferior meatus
sphenopalatine foramen
what opening is at the sphenoethmoidal recess
opening of sphenoid sinus
what opening is at the superior meatus
opening of posterior ethmoidal air cells
what opening is at the middle meatus
opening of frontal sinuses into infundibulum
opening of middle ethmoidal sinuses into ethmoidal bulla
openings of anterior ethmoidal air cells and maxillary sinus in the hiatus semilunaris
what opening is at the inferior meatus
opening of nasolacrimal duct
what opening is at the sphenopalatine foramen
opening of the pterygopalatine fossa
what does the sphenopalatine foramen transmit
sphenopalatine artery
nasopalatine nerve
the vestibule is bound by what
what lines the vestibule
alar plate
skin and hairs
the respiratory region consist of what part of the nasal cavity
lower third of nasal cavity
what does the respiratory region do
warms, moistens and filters air with mucous membrane
the olfactory region of the nasal cavity consists of what
superior nasal concha
upper third of nasal septum
what innervates the olfactory region and what do the nerves do
olfactory nerves- which convey sense of smell to olfactory bulb through cribriform plate of ethmoid bone
whats the blood supply to the nasal cavity
opthalmic artery-through anterior and posterior branches of ethmoidal arteries on lateral wall
posterior lateral nasal and posterior septal branches of sphenopalatine artery of maxillary artery
facial artery- through septal branch of superior labial artery and nasal branch
lymphatic of the nasal cavity drain into
submandibular nodes
retropharyngeal nodes
deep cervical nodes then into jugular trunks
whats the nerve supply to the nasal cavity
olfactory nerve
ophthalmic nerve
maxillary nerve via pterygopalatine ganglion
infraorbital nerve
paranasal sinuses consist of
ethmoidal sinus
frontal
maxillary
sphenoidal
where do paranasal sinuses open into
meatuses of lateral nasal wall
sphenoethmoid recess
what do ethmoidal sinuses have
ethmoidal air cells
where are ethmoidal air cells
within ethmoidal labyrinth between orbit and nasal cavity
ethmoidal sinuses can be subdivided into what and do they drain into
posterior ethmoidal air cells- which drains into superior nasal meatus
middle ethmoidal air cells- which drain into summit of ethmoidal bulla of middle nasal meatus
anterior ethmoidal air cells- which drain into a curved fissure hiatus semilunaris of middle nasal meatus
where do the frontal sinuses lie
frontal bone
where do the frontal sinuses open into
hiatus semilunaris of middle nasal meatus through frontal nasal duct (infundibulum)
frontal sinuses are innervated by
supraorbital branch of the ophthalmic nerve
what are the largest sinuses
maxillary
where do the maxillary sinuses lie
in maxillary bone lateral to nasal cavity and inferior to floor of orbit
maxillary sinuses open into
posterior aspect of hiatus semilunaris of middle nasal meatus
where do sphenoidal sinus lie
sphenoid bone
where does the sphenoidal sinus open
into sphenoethmoidal recess of nasal cavity
what innervates the sphenoidal sinus
maxillary nerve
what lies above the sphenoidal sinus
pituitary gland
sphenoidal sinus can be surgically reached through what
trans-sphenoidal approach
whats a sneeze and this reflex is caused by what
its involuntary expulsion of air through mouth and nose
branches of maxillary nerve
whats an epistaxis
nose bleed from rupture of blood nasal vessels like the sphenopalatine artery
whats maxillary sinusitis
its where an infection spreads from the sinus to the upper teeth causing toothache
what can nasal polyps from sinuses do when they are inflamed
project into nasal cavity and fill nasopharynx
whats rhinoplasty
type of plastic surgery that changes shape and size of nose
