NOSE
The nose has a bony and cartilaginous base of a triangular shape. The skin of the nose is rich in sebaceous glands. The skin overlying the bony part is movable, while the skin overlying cartilaginous part is firmly fixed. The muscles of facial expression inserting into the nose constrict and flare the nostrils.
- The nose is both a respiratory and olfactory organ with a role in forming the timbre of the voice
- It includes the External nose and the nasal cavity.
External anatomy of the nose:
- 1 Root of nose (radix nasi)
- 2 Dorsum of nose / bridge of nose (dorsum nasi)
- 3 Apex of nose / tip of nose (apex nasi)
- 4 Ala of nose / wing of nose (ala nasi)
- 5 Nostrils (nares)
- 6 Nasal septum (septum nasi)
Supply and innervation:
Arterial supply: angular artery (facial artery), infraorbital artery (maxillary artery), supratrochlear and infratrochlear arteries (ophtalmic artery)
Venous drainage: facial vein, inferior ophthalmic vein, pterygoid plexus
Lymphatic drainage: submandibular nodes
Somatomotor (branchiomotor): nasal muscles of facial expression (facial nerve)
Somatosensory: ophthalmic nerve, maxillary nerve (trigeminal nerve)