Nasal Cavity 

overview 

-Superior Part of nasal cavity

-Includes external nose/internal cavity

-Opens externally through nares, posteriorly through choanae 

Nasal Cavity

function

-olfaction

-airway for respiration

-warm and moisten inspired air 

-filter air of foreign matter

-reception of secretion from paranasal sinuses and nasolacrimal duct

External Nose

Blood supply and Innervation

Blood Supply: - Facial artery(lateral nasal and angular aa.)

-Opthalmic artery branches(dorsal nasal a)

Innervation: -Infratrochlear and external nasal nn (V1)

-Infraorbital n. (V2)

-Frontal

-Sphenoidal

-maxillary

-Ethmoidal(anterior,middle,posterior) 

Pterygopalatine Fossa

Contents

Maxillary Artery 

3rd part

-posterior superior alveolar

-infraorbital(anterior superior alveolar)

-descending palatine

-sphenopalatine

-pharyngeal

-artery of pterygoid canal