Nasal Cavity

Question 1

External Nares

Answer 1

Mainly cartilaginous
Nares - nostrils
Alae (wings)
Enter into vestibule
Vibrissae (stiff hairs)

Question 2

Nasal Cavity Skeleton - Floor

Answer 2

Floor = hard palate, maxillae and palatine

Question 3

Nasal Cavity Skeleton - Roof

Answer 3

Frontonasal, Ethmoid, Sphenoid

Question 4

Nasal Cavity Skeleton - Medial Wall

Answer 4

Nasal Septum

• Bone (Vomer and Perpendicular plate of Ethmoid)
• Cartilage

Question 5

Nasal Cavity Skeleton - Lateral Wall

Answer 5

Superior, Middle (ethmoid) and Inferior Concha

Question 6

Spaces associated with Concha –>

Answer 6

Recess or meatus

Question 7

Sphenoethmoidal Recess

Answer 7

Superior to superior nasal concha

Opening of sphenoid air sinus

Question 8

Superior, Middle and Inferior Meatus

Answer 8

Space inferior to the “same named” concha

Question 9

Superior Meatus

Answer 9

Opening of posterior ethmoid air cells

Question 10

Middle Meatus

Answer 10

Hiatus Semilunaris
Openings for Anterior and Middle ethmoid air cells
Openings for Frontal and MAxillary air sinuses

Question 11

Inferior Meatus

Answer 11

Nasolacrimal duct

Question 12

Nerve Supply of nasal cavity

Answer 12

CN 1 - Olfactory

General Sensation - V1 ophthalmic superiorly and V2 maxillary laterally and inferiorly

Question 13

Arterial Supply of nasal cavity

Answer 13

Sphenopalatine - branch of third part of maxillary artery
Facial - superior labial branch
Greater Palatine from descending palatine - branch of third part of maxillary
Epistaxis - nosebleed - most likley occurs at anastomoses of the vessels