Nasal Cavity and Paranasal Sinuses

Question 1

opening of nose

Answer 1

anterior nasal aperture

Question 2

nostrils (nares) created by

Answer 2

alar cartilage

Question 3

opening to nasopharynx

Answer 3

posterior nasal aperture aka choanae

Question 4

roof of each nasal cavity

Answer 4

cribiform plate of ethmoid

body of sphenoid

Question 5

lateral wall of each nasal cavity

Answer 5

vestibule

atrium of middle meatus

Question 6

middle and superior concha are part of what bone?

Answer 6

ethmoid (inferior concha is its own bone)

Question 7

inferior meatus location and contents

Answer 7

below the inferior nasal concha

receives the opening of the nasolacrimal duct

Question 8

middle meatus contents

Answer 8

bulla ethmoidalis
hiatus semilunaris
infundibulum
openings from:
-frontal sinus
-anterior ethmoid sinus
-maxillary sinus
-middle ethmoidal sinus

Question 9

superior meatus contents

Answer 9

opening of posterior ethmoid sinus

Question 10

sphenoethmoidal recess

Answer 10

above superior nasal conchae

contains opening of sphenoidal sinus

Question 11

where does olfactory nerve enter nose

Answer 11

holes in cribiform plate of ethmoid

Question 12

posterior 2/3 of nasal septum made up of

Answer 12

vomer (bottom)

perpendicular plate of the ethmoid bone (top)

Question 13

anterior 1/3 of nasal septum made up of

Answer 13

hyaline cartilage

Question 14

functions of paranasal air sinuses

Answer 14

add resonance to voice
make skull lighter allowing enlargement of local areas
contouring of the head

Question 15

important points about maxillary sinus

Answer 15

largest sinus
teeth may prodrude into here
innervated by maxillary division of trigeminal N
toothache may be perceived as sinus infection or vice versa
opens into middle meatus of nasal cavity

Question 16

important points about frontal sinus

Answer 16

varies in size and may not even be present
innervated by supraorbital N
opens into middle meatus of nasal cavity

Question 17

sphenoidal sinus

Answer 17

in body of sphenoid bone
innervated by branches of maxillary division of trigeminal N and by posterior ethmoidal branch of nasociliary N
opens into sphenoethmoidal recess
-used as surgical approach to pituitary gland

Question 18

Ethmoidal Sinus

Answer 18

made up of several small air cells
posterior ethmoidal air cells open into superior nasal meatus
middle and anterior ethmoidal air cells open into middle meatus
infections in here can go through orbital plate to affect eye