Organization of the Nose and Paranasal Sinuses

External nose

  • Frontal process of maxilla
  • Nasal part of frontal bone
  • Nasal bones
  • Nasal cartilages


Root: part and continous with forehead.

Apex: Tip.

Dorsum Nasi: crest between the root and tip.

Ala: Flaved lower part of the side of the nose.


Tightly adherent to the cartilage over the tip and alae but loose elsewhere.

Mainly the opthalmic nerve.

Blood supply  

Angular, Dorsal nasal, superior labial branches of the facial artery.


The Nasal Cavity and Paranasal Sinuses