nasal cavity

Question 1

nose

Answer 1

part of the respiratory tract superior to the hard palate
-contains peripheral organs of smell
consists: of external nose and nasal cavities divided by a nasal septum

Question 2

each nasal cavity contains

Answer 2

an olfactory area and a respiratory area

Question 3

nasal cavities communicate with the

Answer 3

-nasopharynx posteriorly
-paranasal sinuses superiorly and laterally
-lacrimal sac and conjunctiva superiorly -

Question 4

location of respiratory area of nasal mucosa

Answer 4

inferior 2/3

Question 5

location of olfactory area

Answer 5

superior cavity

Question 6

boundaries of the nasal cavity

Answer 6

roof: frontal, ethmoid, sphenoid bones
-floor: maxilla and palatine
-lateral walls: nasal conchae

Question 7

what forms the lateral walls of the nasal cavity

Answer 7

-superior nasal concha
-middle nasal concha
-inferior nasal concha

Question 8

what do the conchas form

Answer 8

each forms a roof for a meatus

Question 9

meati

Answer 9

provide passageways to the paranasal air sinuses and nasolacrimal duct
-help expose air to mucosal lining

Question 10

nasal septum
composition
innerv:

Answer 10

divides nasal cavity
part cartilage: front part
bone: ethmoid and vomer
innerv: trigeminal nerve CN V1 and V2
has arteries and is covered by mucosal membrane

Question 11

paranasal air sinuses
function and types

Answer 11

-hollow spaces in the skull, and lined by mucosal membrane
-function: warm, moisten, filter inhaled air, and lighten the skull, resonating chambers for speech
-frontal
-ethmoid
-sphenoid
-maxillary

Question 12

sinus passages

Answer 12

-spheno-ethmoidal recess: opening of the sphenoidal sinus
-superior meatus: entrance to posterior ethmoidal sinuses
-middle sinus: entrance to frontal, ethmoidal, and maxillary sinuses
-inferior meatus: opening of the nasal lacrimal duct

Question 13

innervation of the nasal cavity

Answer 13

olfactory nerve CN I
-special sensory: olfactory epithelium covers the superior portions of the nasal septum
trigeminal CN V1 and V2
-general sensory: to the nasal mucosa and palate via the nasopalatine and greater palatine nerves
facial nerve CN VII
visceral motor: post-synaptic parasympathetics to galnds in the mucosa