Chapter 8 (Nasal Region) Flashcards
(Nose)
Is part of the ____ ____ located above the hard palate
respiratory tract
(Nose)
Functions
- Breathing
- Sense of smell (olfaction)
- elimination of secretions from the paranasal sinuses and nasolacrimal ducts
(Nose)
The ____ ____ will divide the chamber of the nose into two ____ ____, each with a roof, floor, medial wall & lateral wall
Nasal septum; nasal cavities
(Boundaries of Nasal Cavities)
Roof
Formed by the hollow body of the sphenoid bone and cribriform plate of the ethmoid bone
(Boundaries of Nasal Cavities)
Floor
Formed by the palatine processes of the maxilla and the horizontal plates of the palatine bone
(Boundaries of Nasal Cavities)
Medial wall
Formed by the nasal septum (vomer, perpendicular plate of the ethmoid, & septal cartilage)
(Boundaries of Nasal Cavities)
Lateral wall
Formed by the nasal conchae (superior, middle, inferior) & meatus (supeiror, middle & inferior)
(Nose - Middle Meatus)
A semicircular groove, the ____ ___, below a rounded elevation, the ___ ___
semilunar hiatus; ethmoidal bulla
(Nose - Middle Meatus)
The semilunar hiatus will receive the opens of ducts from the …
frontal sinus, anterior ethmoidal air cells, and maxillary sinus.
(Nerve Supply of Nasal Region)
The nerve supply of the nasal region consist mainly of:
- Branches of the ophthalmic nerve (CN V1), the anteiror and posterior ethmoidal nerves
- Maxillary nerve (CN V2)
- Olfactory nerve (CN I), including the olfactory bulb & tract for the special sense of smell
(Paranasal Sinuses)
Paranasal sinuses are air-filled extensions of the respiratory part of the nasal cavity names according to the bone which they are located:
- Frontal sinuses
- Sphenoid sinuses
- Ethmoid sinuses
- Maxillary sinuses
(Paranasal Sinuses)
Maxillary sinuses
Potential cause of sinusitis
(Paranasal Sinuses)
Functions of the paranasal sinuses may include:
- Lightening the weight of the head
- Supporting immune defense of nasal cavity
- Humidifying inspired air
- Resonance of the voice
