Nasal Cavity

Superior meatus:

  • Posterior ethmoidal sinus

  • Sphenoid sinus - the sloping posterior roof of the nasal cavity


Middle Meatus:

  • Frontonasal duct

  • Maxillary sinus

  • Anterior ethmoidal sinus


Inferior Meatus:

  • Nasolacrimal duct

  • Lacrimal fluid


Greater Palatine:

  • through incisive fossa

  • Supplies mesial wall and floor


Anterior area of septum = superior labial artery


Nasopalatine:

  • Through incisive canal

  • Supplies oral mucosa posterior to incisors


Middle ethmoidal cells open on the bulla ethmoidalis - swelling on the superior border of the middle meatus


Medial Wall of Orbit:

  1. The frontal process of the maxilla

  2. Lacrimal

  3. The orbital plate of the ethmoid

  4. Body of sphenoid


Lateral nasal artery = external nose and vestibule


Anterior and posterior ethmoid arteries = medial and lateral wall


Lateral Wall of Nasal Cavity:

  1. Ethmoid

  2. Concha

  3. Perpendicular plate of palatine

  4. Medial pterygoid of the sphenoid

  5. Medial surface of lacrimal and maxilla


Ethmoid infundibulum opens into the frontal sinus - anterior ethmoid cells drain into this