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Nasal Cavity
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What seperates the nares?
Median septal cartilage
What does the medial septal cartilage of the nose articulate with?
Anteriorly
: Maxillae
Posteriorly
: Vomer and perpendicular plate of the ethmoid
What cartilages define the nostril shape?
Alar cartilages
What cartilages are found on the side of the nose?
Paired lateral nasal cartilages
What 3 bones make up the immovable skeleton of the nose?
Nasal bones
Basal part of frontal bones
Frontal processes of the maxillae
Where does the nasal cavity begin and end?
Begins
: Nostril
Ends
: Choana
What does the choana open to?
Nasopharynx
What part of the nasal cavity is lined with skin and has hair?
Vestibule
What is the atrium covered by?
Respiratory nasal mucosa
What is the division of the mucosa of the nasal cavity?
Posterior 1/3
: Olfactory
Inferior 2/3
: Respiratory Area
What is the floor, medial wall and lateral wall of the nasal cavity formed by?
Floor
: Palatine bones and palatine processes of the maxilla
Medial Wall
: Septal cartilage, vomer and plate of the ehtmoid
Lateral Wall
: Conchae
What are the superior, middle and inferior concha made of?
Superior and Inferior
: Ehtmoid bone
Inferior
: Seperate bone, largest
What is the role of the conchae?
Increase surface area and allow air to be warmed and humidified
What are the passageways between the concha called?
Superior meatus
Middle meatus
Inferior meatus
What is the space posterosuperiorly to the superior concha called and what is its role?
Sphenoethmoidal recess
Role
: Communicates with the sphenoid sinus
What does the superir meatus communicate with?
Posterior ethmoidal sinus
What does the middle meatus communicate with?
Frontal sinus
Anterior ethmoidal sinus
Middle ethmoidal sinus
Maxillary sinus
What is special about the middle meatus and its structure?
Contains a hiatus semilunaris
Between ethmoid bulla and uncinate process
What does the inferior meatus communicate with?
The orbit through the nasolacrimal duct
What are the paranasal sinuses?
Frontal sinuses
: May be single or multiple
Ethmoid sinuses
Sphenoid sinuses
Maxillary sinuses
What does the roof of the maxillary sinus form?
Floor of the orbit
How does the frontal sinus drain into the nasal cavity?
Via the infundibulum of the middle meatus via frontonasal ducts
What do the nasal branches of the anterior ethmoidal artery supply?
Mucosa of the nose
Anterior regions of the lateral walls
Nasal septum
How does the greater palatine artery enter the nasal cavity?
Incisive foramen
What is the major blood supply to the posterior regions of the lateral walls and nasal septum?
Sphenopalatine arteries
How does the sphenopalatine artery enter the nasal cavity?
Sphenopalatine foramen
What supplies the posterior protions of the nasal cavity?
Posterior eithmoidal arteries
What innervates the respiratory area and through what type of fibers?
GSA from V1 and V2
What supplies the innervation to the nasal septum and how do they travel?
Nasopalatine (V2)
Travels with sphenopalatine arteries
Author
Anonymous
ID
106271
Card Set
Nasal Cavity
Description
Med School - Nasal Cavity
Updated
2011-10-04T03:49:47Z
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