Nasal cavity (boundaries, sinus openings), vessels and nerves

Boundaries of nasal cavity

 * Superior


 * 1) Nasal bones
 * 2) Nasal part of frontal bone
 * 3) Cribriform plate (ethmoid bone)




 * Lateral


 * 1) Frontal process of maxillary bone
 * 2) Perpendicular plate of palatine bone
 * 3) Nasal part of lacrimal bone
 * 4) Ethmoidal labyrinth
 * 5) Medial plate of pterygoid process
 * 6) Bone of inferior nasal concha


 * Medial


 * 1) Mucous part
 * 2) Cartilaginous part - Septal cartilage
 * 3) Bony part - Perpendicular plate of ethmoid bone & Vomer


 * Inferior (extends from ANS to PNS)


 * 1) Horizontal plate of palatine bone
 * 2) Palatine process of maxilla

Sinus openings

 * Superior nasal meatus sinus openings


 * 1) Posterior ethmoidal air cells


 * Middle nasal meatus sinus openings


 * 1) Frontal sinus (semilunar hiatus)
 * 2) Anterior ethmoidal air cells (semilunar hiatus)
 * 3) Maxillary sinus (semilunar hiatus)
 * 4) Middle ethmoidal air cells (ethmoidal bulla)


 * Inferior nasal meatus sinus openings


 * 1) Nasolacrimal duct

Arterial supply
Receives innervation from both external and internal carotid arteries

Branches from External carotid artery


 * Maxillary -> Sphenopalatine


 * Maxillary -> Descending palatine -> Greater palatine


 * Facial -> Superior labial

Branches from Internal carotid artery


 * Opthalmic -> Anterior & posterior ethmoidal

Lateral nasal wall, arterial supply


 * Posterior lateral nasal branch (sphenopalatine)


 * Anterior ethmoidal branches


 * Middle ethmoidal branches


 * Lateral nasal branches of superior labial artery

Medial nasal wall, arterial supply


 * Nasopalatine artery


 * Greater palatine artery