Nasal Cavity and Paranasal Sinuses

Question 1

Framework of upper nose

Answer 1

nasal bones and frontal process of maxilla

Question 2

Framework of lower nose

Answer 2

1 septal and 2 major alar cartilages

Question 3

Connect cartilages to each other

Answer 3

Fibrous Tissue

Question 4

Septal Cartilage

Answer 4

forms anterior part of nasal septum

2 lateral processes

Question 5

Major Alar Cartilage

Answer 5

U shaped

form lateral and medial borders of nostrils

Question 6

Vestibule

Answer 6

area immediately above nasal opening

lined with skin contains stiff hairs

Question 7

Nasal Cavity Functions

Answer 7

Olfaction
Conditioning of air
Receive secretions of paranasal air sinuses and nasolacrimal duct

Question 8

Superior Meatus

Answer 8

small orifices in lateral wall cause posterior ethmoidal air cells to open

Question 9

Ethmoidal Bulla

Answer 9

lateral wall of Middle Meatus

elevated by middle ethmoidal air cells

Question 10

Semilunar Hiatus

Answer 10

curved cleft anterior and inferior to ethmoidal bulla

in Middle meatus

Question 11

Location of Ostium of Maxillary Sinus

Answer 11

lower part of semilunar hiatus

Question 12

Infundibulum

Answer 12

part of Middle Meatus

receives openings of anterior ethmoidal air cells and sometimes frontal sinus

Question 13

Inferior Meatus

Answer 13

contains opening of nasolacrimal duct

Question 14

Sphenoethmoidal Recess

Answer 14

Opening of Sphenoidal Sinus

Question 15

Nasal Mucosa

Answer 15

bound to periosteum and perichondrium

in nasal cavity, paranasal sinuses, nasolcarimal duct

Question 16

Olfactory Mucosa

Answer 16

lines roof and lateral wall

contains olfactory receptor cells

Question 17

Respiratory Mucosa

Answer 17

lines floor and medial wall

contains respiratory epithelium

Question 18

Anterior Ethmoidal Nerve

Answer 18

branch of nasociliary nerve (from ophthalmic n)
passes through ethmoidal foramen
splits into internal and external nasal branches

Question 19

Internal Nasal Branch

Answer 19

from Anterior Ethmoidal N

supplies mucosa of ant part of septum and lateral wall

Question 20

External Nasal Branch

Answer 20

from Anterior Ethmoidal N

supplies skin of lower part of nose

Question 21

Nasal Branch of Infraorbital Nerve

Answer 21

inn skin of vestibule

Question 22

Nasal Branch of Anterior Superior Alveolar Nerve

Answer 22

inn mucosa of ant part of inferior meatus

Question 23

Posterolateral Nasal Branches

Answer 23

from pterygopalatine ganglion or greater palatine n

inn mucosa of post part of lateral wall

Question 24

Nasopalatine Nerve

Answer 24

inn mucosa of posterior part of nasal septum

Question 25

Olfactory Receptor Cells

Answer 25

bipolar neurons | in olfactory mucosa

Question 26

Peripheral Processes (Dendrites)

Answer 26

reach mucosal surface and give rise to nonmotile cilia

Question 27

Central Processes (Axons)

Answer 27

join to form olfactory nerves pass through cribiform plate end in olfactory bulb

Question 28

Sphenopalatine Artery

Answer 28

terminal branch of maxillary artery | supplies posterior parts of lateral wall and septum

Question 29

Anterior Ethmoidal Artery

Answer 29

branch of ophthalmic artery | supplies anterior parts of lateral wall and septum

Question 30

Kiesselbach's Area

Answer 30

Common place for nosebleeds | where sphenopalatine, greater palatine, anterior ethmoidal, superior labial aa fuse

Question 31

Paranasal Sinuses

Answer 31

air spaces in frontal, maxilla, ethmoid, sphenoid bones | lined by mucous membrane

Question 32

Paranasal Sinus Function

Answer 32

resonating chambers for voice | lighten skull bones

Question 33

Maxillary Sinus

Answer 33

largest in body of maxilla base toward nasal cavity (medial), apex toward zygomatic bone (lateral)

Question 34

Nerve supply to Maxillary Sinus

Answer 34

Superior Alveolar Nerves (V2)

Question 35

Blood Supply to Maxillary Sinus

Answer 35

Superior Alveolar Arteries (branch of maxillary/ infraorbital aa)

Question 36

Frontal Sinuses

Answer 36

in frontal sinuses | open into middle nasal meatus

Question 37

Nerve Supply to Frontal Sinus

Answer 37

supraorbital nerve (branch of frontal n, from V1)

Question 38

Blood Supply to Frontal Sinus

Answer 38

Supraorbital Artery (branch of ophthalmic a)

Question 39

Ethmoidal Air Cells

Answer 39

3-18 | Anterior, Middle, Posterior

Question 40

Anterior Ethmoidal Air Cells

Answer 40

open into infundibulum of middle nasal meatus

Question 41

Middle Ethmoidal Air Cells

Answer 41

open to ethmoidal bulla of middle nasal meatus

Question 42

Posterior Ethmoidal Air Cells

Answer 42

open into superior nasal meatus

Question 43

Nerve Supply to Ethmoidal Air Cells

Answer 43

anterior and posterior ethmoidal nerves (branches of nasociliary n, V1)

Question 44

Blood Supply to Ethmoidal Air Cells

Answer 44

Anterior and Posterior Ethmoidal AA (branches of ophthalmic a)

Question 45

Sphenoidal Sinuses

Answer 45

in body of sphenoid superior to pituitary and optic chiasm, lateral to cavernous sinus and internal carotid open into sphenoethmoidal recess

Question 46

Nerve Supply to Sphenoidal Sinuses

Answer 46

Posterior Ethmoidal N, Pharyngeal N

Question 47

Blood Supply to Sphenoidal Sinuses

Answer 47

Posterior Ethmoidal A | Pharyngeal Branch of Maxillary A