Nasal cavity and paranasal air sinuses Flashcards
What is the respiratory mucosa that forms the nasal cavity lined by?
Pseudostratified columnar epithelium
Which cranial nerve innervates the mucosa?
Cranial Nerve 1 - The olfactory nerve
What are the names of the bony projections which mark the lateral wall of the nasal cavity?
Conchae/ Turbinates
What are the names of the 3 parts that the conchae split the cavity into?
Superior Meatus
Middle Meatus
Inferior Meatus
What is the name given to the space above the superior concha?
Speno-ethmoidal recess
Which conchae are parts of the ehtmoid bone?
Superior and middle
The lowest part of the septum is formed by what?
Maxilla
Palatine bone
What are the names of the large hollow bones that surround the nasal cavity?
Facial
Maxilla
Sphenoid
Ethmoid
What are the paranasal sinuses filled with in a healthy person?
Air
What are the main functions of the paranasal sinuses?
Decrease relative weight of the front of the skull Increases Resonance of the voice Provides buffer against facial trauma Humidification of air Immunological defence
Where does the maxillary sinus extend backwards all the way to?
The point where the maxilla borders the pterygoidal maxillary fissure
Why is the maxillary sinus not able to drain very well?
Due to its opening not being at its most inferior
What is above the sphenoid sinus?
The floor of the anterior cranial fossa
What are on each side of the ethmoid bone?
The cribriform plates
What is the most lateral part of the ethmoid bone?
Lamina Papyracea
