NASAL REGION
The nasal region is demarcated superiorly by the line connecting the medial ends of the eyebrows, inferiorly by a horizontal line passing through the lowest point of the nasal septum, and laterally by the nasobuccal sulcus.
- 1. The external nose consists of bony and cartilaginous parts, which can be distinguished by palpation: the bony nose is rigid, while the cartilaginous one is flexible. The parts of the external nose—radix, dorsum, apex, alae and nares—are easily observed.
Nasal conchae and meatuses
Conchae
- 1 Superior nasal concha
- 2 Middle nasal concha
- 3 Inferior nasal concha
Meatuses and openings of the paranasal sinuses
- 4 Superior nasal meatus – is located between the ceiling of the nasal cavity and middle nasal concha
- 4.1 Sphenoidal sinus
- 4.2 Posterior ethmoidal cells
- 5 Middle nasal meatus – is located between the middle and inferior nasal concha
- 5.1 Anterior and middle ethmoidal cells
- 5.2 Frontal sinus
- 5.3 Maxillary sinus
- 6 Inferior nasal meatus – is located between the inferior nasal concha and the floor of the nasal cavity
- 6.1 Nasolacrimal duct
- 7 Common nasal meatus – is located between the medial edges of the nasal conchae and the nasal septum
- 8 Nasopharyngeal meatus – is located between the dorsal edges of the nasal conchae and the choanae