Nasal Cavity

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Nasal Cavity
2011-10-03 23:49:47
Nasal Cavity

Med School - Nasal Cavity
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  1. What seperates the nares?
    Median septal cartilage
  2. What does the medial septal cartilage of the nose articulate with?
    • Anteriorly: Maxillae
    • Posteriorly: Vomer and perpendicular plate of the ethmoid
  3. What cartilages define the nostril shape?
    Alar cartilages
  4. What cartilages are found on the side of the nose?
    Paired lateral nasal cartilages
  5. What 3 bones make up the immovable skeleton of the nose?
    • Nasal bones
    • Basal part of frontal bones
    • Frontal processes of the maxillae
  6. Where does the nasal cavity begin and end?
    • Begins: Nostril
    • Ends: Choana
  7. What does the choana open to?
  8. What part of the nasal cavity is lined with skin and has hair?
  9. What is the atrium covered by?
    Respiratory nasal mucosa
  10. What is the division of the mucosa of the nasal cavity?
    • Posterior 1/3: Olfactory
    • Inferior 2/3: Respiratory Area
  11. 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
  12. What are the superior, middle and inferior concha made of?
    • Superior and Inferior: Ehtmoid bone
    • Inferior: Seperate bone, largest
  13. What is the role of the conchae?
    Increase surface area and allow air to be warmed and humidified
  14. What are the passageways between the concha called?
    • Superior meatus
    • Middle meatus
    • Inferior meatus
  15. What is the space posterosuperiorly to the superior concha called and what is its role?
    • Sphenoethmoidal recess
    • Role: Communicates with the sphenoid sinus
  16. What does the superir meatus communicate with?
    Posterior ethmoidal sinus
  17. What does the middle meatus communicate with?
    • Frontal sinus
    • Anterior ethmoidal sinus
    • Middle ethmoidal sinus
    • Maxillary sinus
  18. What is special about the middle meatus and its structure?
    • Contains a hiatus semilunaris
    • Between ethmoid bulla and uncinate process
  19. What does the inferior meatus communicate with?
    The orbit through the nasolacrimal duct
  20. What are the paranasal sinuses?
    • Frontal sinuses: May be single or multiple
    • Ethmoid sinuses
    • Sphenoid sinuses
    • Maxillary sinuses
  21. What does the roof of the maxillary sinus form?
    Floor of the orbit
  22. How does the frontal sinus drain into the nasal cavity?
    Via the infundibulum of the middle meatus via frontonasal ducts
  23. What do the nasal branches of the anterior ethmoidal artery supply?
    • Mucosa of the nose
    • Anterior regions of the lateral walls
    • Nasal septum
  24. How does the greater palatine artery enter the nasal cavity?
    Incisive foramen
  25. What is the major blood supply to the posterior regions of the lateral walls and nasal septum?
    Sphenopalatine arteries
  26. How does the sphenopalatine artery enter the nasal cavity?
    Sphenopalatine foramen
  27. What supplies the posterior protions of the nasal cavity?
    Posterior eithmoidal arteries
  28. What innervates the respiratory area and through what type of fibers?
    GSA from V1 and V2
  29. What supplies the innervation to the nasal septum and how do they travel?
    • Nasopalatine (V2)
    • Travels with sphenopalatine arteries