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26 Cards in this Set
- Front
- Back
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Which bone forms the roof as well as part of the lateral walls and septum of the nasal cavity?
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Ethmoid bone
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The medial, descending plate of the ethmoid bone is called the...
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Perpendicular plate
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The lateral descending portions of the ethmoid bone are called the...
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Lateral masses
The lateral masses contain the ethmoid sinuses. The superior and middle turbinates arise from the lateral masses. |
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The superior and middle nasal turbinates are part of which bone?
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Ethmoid bone
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The ethmoid sinuses are located within which part of the ethmoid bone?
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Lateral masses
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The roof of the nasal cavity is composed of which part of the ethmoid bone?
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Cribiform plate
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What is the cribiform plate?
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The cribiform plate is the portion of the ethmoid bone that forms the roof of the nasal cavity.
It contains the olfactory foramen through which the olfactory nerves pass. |
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What is the crista galli?
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The crista galli is the portion of the ethmoid bone that projects superiorly above the cribiform plate.
The portion that projects inferiorly is the perpendicular plate. |
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What is the physiologic role of the nasal turbinates/chonchae?
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The turbinates greatly increase the vascular and mucous membrane surface area in the nasal cavity, which warms and moistens (humidifies) inhaled air before it passes into the lungs.
The turbinates also cause the inhaled air to swirl, and the result is that many inhaled particles become trapped in the mucus that lines the nasal cavity. This action of the conchae helps cleanse inhaled air before it passes into the rest of the respiratory passageways. To summarize: they increase the surface area of the humidifying and cleansing tissue of the nose. |
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What's another name for concha?
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Turbinate
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What's another name for turbinate?
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Concha
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Which structures form the lateral walls of the nasal cavity?
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Anteriorly:
-lateral crus of the major alar cartilage -lateral process of nasal septal cartilage More posteriorly: -superior: middle and superior turbinates of ethmoid bone -inferior: inferior nasal turbinate bone |
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The superior and middle turbinates are part of the ethmoid bone.
What about the inferior turbinate? |
The inferior nasal turbinates are their own bones, not part of another bone.
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Which structures form the medial wall (septum) of the nasal cavity?
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Anteriorly:
-medial crus of the major alar cartilage -nasal septal cartilage More posteriorly: -superior: perpendicular plate of ethmoid bone -inferior: volar bone |
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Which structure/structures form the roof of the nasal cavity?
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Cribiform plate of the ethmoid bone.
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If you're going through the nasal cavity from anterior to posterior, would you come to the ethmoid or the sphenoid bone first?
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Ethmoid!
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Which bones form the floor of the nasal cavity?
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Anteriorly:
-maxillae Posteriorly: -palatine |
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The space between the superior and middle turbinates is called...
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Superior nasal meatus
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The space between the inferior and middle turbinates is called....
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Middle nasal meatus
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The space between the inferior turbinate and the floor of the nasal cavity is called....
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Inferior nasal meatus
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Describe the different parts of the ethmoid bone.
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Crista galli (superior projection)
Cribiform plate Lateral masses (lateral inferior projections) Perpendicular plate (medial inferior projection) |
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What is the scientific name for the nostrils?
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External nares
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The openings through which the nasal cavity communicates with the nasopharynx are collectively called the...
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Choana
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What is the choana?
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Name for the openings through which the nasal cavity communicates with the nasopharynx.
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What is Kiesselbach's area?
Where is it located? What is its clinical significance? |
Kiesselbach's plexus, which lies in Kiesselbach's area (also called Little's area), is a region in the anteroinferior part of the nasal septum where five arteries anastomose to form a vascular plexus of that name.
It is clinically significant in that it is the source of anterior nose bleeds, which account for over 90% of epistaxis. |
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What is the name of the little groove in the sphenoid bone that the pituitary gland sits in?
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Sella turcica
The "Turkish chair" |
