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The Nasal Cavity |
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| Extent |
 |
External
opening: Nostril
Posterior opening: Choanae
Inferior: Hard palate
Superior: Anterior part
of cranial base |
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| Subdivisions of each
nasal cavity |
- Vestibule :
Between the alae and septum. Lined by skin with vibrissae to filter
coarse particles.
- Respiratory portion :
Most of the nasal cavity lined by respiratory epithelium
- Olfactory portion:
Area over superior concha and superior part of nasal septum.
Lined by olfactory epithelium.
What are the microscopic differences
between olfactory adn respiratory epithelium? |
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| Walls of nasal cavity |
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- Floor: The palate
- Roof: Frontal bone,
nasal bone, cribriform plate of ethmoid, body of sphenoid.
- Medial wall: Nasal
septum
- Lateral Wall:
- Bones: Nasal, lacrimal, maxilla (alar and lateral
cartilages)
- Conchae: Superior and middle are parts of the
ethmoid bone. Inferior is a separate bone.
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