nasal cavity

Question 1

what forms the medial wall

Answer 1

• nasal bone
• septal cartilage
• perpendicular plate of ethmoid bone
• vomer bone
• nasal crest of palatine and maxillary bone

Question 2

what contributes to the lateral wall

Answer 2

• nasal bone
• superior concha (ethmoid bone)
• middle concha (ethmoid bone)
• inferior concha
• frontal process of maxilla
• *lacrimal bone
• perpendicular plate of palatine bone
• lateral process of septal cartilage
• middle pterygoid plate of sphenoid bone

Question 3

where does the sphenoidal sinus drain

Answer 3

Spheno-ethmoidal recess

-(top of nasal cavity)

Question 4

where do the posterior ethmoidal cells drain

Answer 4

deep to the superior meatus/superior concha

Question 5

what drains deep to the middle concha

Answer 5

middle and anterior ethmoidal cells

maxillary sinus

Question 6

what sinus drains deep to the inferior concha

Answer 6

no sinuses

only the nasolacrimal duct

Question 7

what artery is associated with posterior nasal bleeding

Answer 7

sphenopalatine artery (comes through the sphenopalatine foramen)

Question 8

anterior nasal bleeding

Answer 8

a number of arteries in the front of the nasal cavity anastomose and result in anterior nasal bleeding

Question 9

venous drainage

Answer 9

veins drain mainly into the

• facial vein
• pterygoid plexus

Question 10

innervation of the nasal cavity

• include both sympathetic and parasympathetic

Answer 10

olfactory nerve

V1 and V2 provide general sensation

parasympathetic = facial nerve
sympathetic = cervical plexus T1

Question 11

what structures from the ethmoid bone make up the nasal cavity

Answer 11

• crista galli
• cribriform plate
• perpendicular plate
• superior concha
• middle concha

Question 12

infundibulum

Answer 12

channels that drain back to the nose

- allow communication between the sinuses and the nasal cavity