Nasal Cavity

Question 1

Separation of nasal cavities

Answer 1

Each other = septum
Cranium = parts of frontal, ethmoid + sphenoid
Oral = hard palate

Question 2

Nasal septum

Answer 2

Medial wall
Consists of:
*septal cartilage = ant.
*vomer + perpendicular plate ethmoid = post.
*nasal bone + nasal spine of frontal bone
*incisor crest, crest of maxilla + palatine

Question 3

Lateral wall of nasal cavity: bony parts

Answer 3

Ethmoidal labyrinth
Sup. concha
Middle concha
Uncinate process of ethmoid
Perpendicular plate of palatine
Med. pterygoid plate of sphenoid
Med. surface maxilla + lacrimal
Inf. concha

Question 4

Air channels of nasal cavity

Answer 4

Inf. meatus = btw. inf. concha + floor
Middle meatus = btw. inf. + middle concha
Sup. meatus = btw. middle + sup. concha
Sphenoethmoidal recess = btw. sup. concha + roof

Question 5

Paranasal sinuses: name

Answer 5

Frontal
Ethmoid
Sphenoid
Maxillary

Question 6

Paranasal sinuses: functions

Answer 6

Humidify air
Decrease weight of skull
Voice resonance

Question 7

Frontal sinus

Answer 7

Frontal bone, under forehead

Open into middle via frontonasal duct

Question 8

Ethmoid sinus

Answer 8

Air cells in labyrinth = connected by cribriform plate
Ant. = into middle via ethmoidal infundibulum, ant. end semilunar hiatus
Middle = into middle via ethmoid bulla
Post. = into sup.

Question 9

Sphenoid sinuses

Answer 9

Post. to sup. part of cavity

Sphenoethmoidal recess

Question 10

Maxillary sinus

Answer 10

Largest

Middle, central part of semilunar hiatus