upper airway

Question 1

function of nasal cavities

Answer 1

permit airflow into airway

Question 2

names of inwardly projecting shelves of bones in nasal cavities

Answer 2

terbinate/conchae bones

Question 3

what are conchae covered with

Answer 3

respiratory epithelium

Question 4

number of pairs of conchae in nasal cavity, and names

Answer 4

3, so superior, middle and inferior

Question 5

name of spaces below conchae

Answer 5

meatus (superior, middle and inferior)

Question 6

3 functions of conchae and meatus

Answer 6

warm and humidify air, help trap pathogens, drainage route for sinuses

Question 7

6 bones that contribute to nasal cavities

Answer 7

frontal process of maxilla, lacrimal bone, uncinate process of ethmoid, medial pterygoid plate of sphenoid bone, perpendicular plate of palatine bone, nasal bone

Question 8

3 cartilages contributing to nasal cavities

Answer 8

major alar cartilage, minor alar cartilage, lateral process of septal cartilage

Question 9

4 nerves innervating nasal cavities

Answer 9

olfactory (CN I), trigeminal nerve (CN V), facial nerve (CN VII), sympathetic nerves (form T1 via arteries)

Question 10

what is olfactory nerve responsible for

Answer 10

olfaction (smell)

Question 11

what 2 divisions of trigeminal nerve innervate nasal cavities

Answer 11

V1 (ophthalmic) and V2 (maxillary)

Question 12

what does facial nerve innervate in nasal cavities

Answer 12

glands (e.g. lacrimal)

Question 13

what do sympathetic nerves innervate in nasal cavities

Answer 13

vascular smooth muscle

Question 14

major arterial blood supply to nasal cavities

Answer 14

mainly from branches of internal carotid arteries, with some from external carotid artery too

Question 15

venous drainage of nasal cavity and significance

Answer 15

superior parts of nasal cavity drain into cranial cavity (route of infection)