anatomy : Nasal Cavity, Paranasal air sinuses

Question 1

Borders of the nasal cavity

Superior / inferior / posterior / anterior

Answer 1

• cribiform plate of Ethmoid bone and olfactory bulbs
• Hard palate and soft palate
• Chonnae (openings to the nasopharynx) and Pharyngeal tonsil
• Vestibule

Question 2

the external nose consists fo two bony parts

1. upper bony part

Answer 2

nasal bones that articulate in midline:
– Nasal process of frontal bone.
– Nasal process of maxillary bone.

Question 3

the external nose consists fo two bony parts

2- lower cartilagenous part:

Answer 3

✓ Lateral cartilage
– Nasal bones and maxilla
✓ Septal Cartilage
– Nasal septum
✓ Alar cartilage
– Areolar tissue

Question 4

nasal cavity
antero-postero
wide

Answer 4

6-7cm

2cm

Question 5

nasal cavity functions

Answer 5

respiration
olfaction
humidification
filtration

Question 6

nasal cavity covered in

Answer 6

pseudostratified, ciliated columnar epithelium

Question 7

Boundaries

roof

Answer 7

roof = floor of anterior cranial fossa

centrally. … cribiform plate
posteriorly. ..body of sphenoid
anteriorly. …frontal and nasal bones

Question 8

boundaries

floor

Answer 8

floor=roof of oral cavity
HARD PALATE
1. The palatal processes of the
maxilla
2. Horizontal plate of the palatine
bone
SOFT PALATE

Question 9

NASAL SEPTUM

3 contributions

Answer 9

1) Septal cartilage
2) Vertical plate of the ethmoid bone
3) Vomer

Question 10

The ethmoid bone

3 contributions

Answer 10

1. the cribriform plate,
2. the perpendicular plate
3. the ethmoidal labyrinth.

Question 11

function of nasal conchae

Answer 11

✓ Increase the respiratory surface area
✓ Create turbulence within the passing air
✓ Warm, filter and moisten air coming in to the lungs

Question 12

3 functional regions of the nasal cavity

determinded by

Answer 12

type of mucous membrane lining each region

Question 13

3 functional regions of the nasal cavity

names

Answer 13

olfactory area
respiratory area
vestibular area

Question 14

olfactory area

• type of cell
• contains

Answer 14

✓ ciliated columnar epithelium
✓ contains receptors of the olfactory
nerve

Question 15

The respiratory area

Answer 15

✓ vascular mucoperiosteum of
pseudostratified ciliated columnar epithelium
✓ respiratory epithelium.

Question 16

The vestibular area

Answer 16

lined by skin containing hair follicles

Question 17

Nerve supply
general sensation is from…
sensations of…

Answer 17

• V-1 or V-2. (ophthalmic branch (anterior region) and maxillary branch (posterior region)
• touch, pressure and temperature

Question 18

Special sensation is carried by

Answer 18

olfactory nerve

Olfactory receptor neurons in the olfactory mucosa project to the olfactory bulbs

Question 19

Arterial supply of nose and nasal cavities

Answer 19

• Sphenopalatine branch of the maxillary (from external carotid)
• Anterior and posterior ethmoidal branches of the ophthalmic artery (external carotid)

Question 20

Paranasal Air Sinuses
lined by
open into
innervated by

Answer 20

respiratory mucosa, which is ciliated and mucus secreting
nasal cavity
branches of the trigeminal nerve

Question 21

innervations of

Maxillary sinuses
Frontal sinuses
Ethmoid sinus
Sphenoid sinus

Answer 21

V2 (maxillary)
V1 (opthalamic)
V1&2
V1&2

Question 22

function of ostia

Answer 22

allow drainage of sinuses to the nasal cavities

Question 23

function of Paranasal Air Sinuses

Answer 23

Lightening the skull

Add resonance to speech

Question 24

Sinusitis

Answer 24

Infection of the sinuses
Maxillary – cheek pain
Frontal – headache
Ethmoid – headache
Sphenoid – pain around the eyes