The external nose is the visible pyramid on the face, built from paired nasal bones above and flexible cartilages below, covered by skin and lined inside by the nasal vestibule. Its two nostrils open into the nasal cavity.
| Location | Centre of the face, projecting from the piriform aperture of the skull |
|---|---|
| Parts |
|
| Nerve Supply | Infratrochlear and external nasal nerves (from the ophthalmic nerve); Infraorbital nerve; Facial nerve (muscles) |
| Blood Supply | Facial artery (lateral nasal and septal branches); Dorsal nasal artery; Anterior ethmoidal artery (external nasal branch); Infraorbital artery |
| Venous drainage |
|
| Lymphatic drainage |
|
Warms, filters and humidifies inhaled air at its entrance and helps direct airflow to the smell area.
The nasal bones are the most commonly fractured facial bones. Veins of this area connect with the cavernous sinus, so infection around the nose and upper lip (the danger triangle) can rarely spread inside the skull. Basal cell carcinoma frequently affects the nasal skin.
Break of the nasal bones from a blow, causing deformity, bleeding and blockage.
Blood collection under the septal lining after injury that must be drained to prevent cartilage loss.
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