Nasal Cavity

Front 1

Nasal Cavity Borders:
Roof

Back 1

divided into 3 parts:
-frontonasal
-ethmoidal
-sphenoidal

Front 2

Nasal Cavity Borders:
Floor

Back 2

-palatine process of maxilla
-horizontal plate of palatine bone

Front 3

Nasal Septum:
Structures

Back 3

-septal cartilage (anterior)
-perpendicular plate of ethmoid bone (superior)
-vomer (posterior/inferior)

Front 4

Nasal Septum:
Arterial Supply

Back 4

-opthalmic a.: septal branches of anterior and posterior ethmoidal as.
-maxillary a.: septal branch of sphenopalatine and distal branch of greater palatine

Front 5

Nasal Septum:
Innervation

Back 5

-anterior ethmoidal n. (V1) for SA
-nasopalatine n. (V2) for SA
-Internal branch of the infraorbital nerve (V2) for SA
-CN I for SS
-symp/post fibers for blood flow regulation
-para/post fibers from pterygopalatine g. for secretomotor innervation of mucous glands

Front 6

Lateral Wall:
Structures

Back 6

-superior, middle and inferior concha
air channels formed b/w conchae:
-sphenoethmoidal recess
-superior, middle, and inf. meatus

Front 7

Lateral Wall:
Arterial Supply

Back 7

-opthalmic a.: anterior and posterior ethmoidal as.
-facial a.: lateral nasal a.
-maxillary a.: sphenopalatine a.

Front 8

Lateral Wall:
Innervation

Back 8

-anteiror ethmoidal n. (V1) for SA
-posterior (sup. and inf.) lateral nasal ns. (V2) for SA
-internal branch of the infraorbital nerve (V2) for SA
-CN I for SS
-symp/post fibers for blood flow regulation
-para/post fibers from pterygopalatine g. for secretomotor innervation of mucous glands

Front 9

Frontal Sinus

Back 9

drains through the frontalnasal duct into the ethmoidal infundibulum (opens into the semilunar hiatus of the middle meatus)

Front 10

Ethmoid Sinus:
Anterior Ethmoidal Air Cells:

Back 10

drain into the middle meatus through the ethmoidal infundibulum

Front 11

Ethmoid Sinus:
Middle Ethmoidal Air Cells:

Back 11

drain into the middle meatus through the ethmoidal bulla

Front 12

Ethmoid Sinus:
Posterior Ethmoidal Air Cells:

Back 12

drain directly into the superior meatus

Front 13

Sphenoid Sinus

Back 13

drains directly into the sphenoethmoidal recess

Front 14

Maxillary Sinus

Back 14

drains into the middle meatus by way of the semilunar hiatus

Front 15

Lacrimal Sac

Back 15

drains into the inferior meatus by way of the nasolacrimal duct