Nasal Cavity And Paranasal Sinuses Flashcards Preview

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Flashcards in Nasal Cavity And Paranasal Sinuses Deck (96)
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1

Shape of the nose

Pyramidal
-upper end is root
-free tip is apex

2

Dorsum of nose

Extends from root to apex, in midline

3

What are the two inferior apertures of the nose?

The nares (nostrils)

4

What is each nostril limited by?

Laterally by the ala of nose

5

What is the supporting framework of nose composed of?

Bone and hyaline cartilage

6

What part of the nose does the bony framework support?

Upper part

7

What does the bony framework consist of?

Nasal bonds and frontal processed of maxillae

8

What supports the lower part of the nose?

Cartilagenous framework

9

What does the cartilagenous framework consist of?

One septal and two major alar cartilages

10

What ar the cartilages connected to each other and the bone by?

Fibrous tissue

11

What is the largest cartilage of the nose?

Septal cartilage

12

septal cartilage

-Forms anterior part of the nasal septum
-Has 2 lateral processes (triangular in shap, located below inferior border of nasal bone

13

Major alar cartilages

-u-shaped, form lateral and medial borders of the nostrils (lateral and medial crura, respectively)

14

What is the nasal cavity?

Chamber consisting of bony cartilaginous walls, covered with mucosa

15

Where does the nasal cavity open?

Anteriorly on face via the nares

16

What does the nasal cavity communicate with posteriorly and by what?

Nasopharyngeal via posterior nasal aperture (choanae)

17

The area immediately above the nares

Vestibule

18

What is the vestibule lined with?

Skin and stiff hairs

19

Functions of nasal cavity

-olfaction
-conditioning of inspired air (filtration, humidification, warming)
-reception of secretions from paranasal air sinuses and nasolacrimal duct

20

Superior relationship of nasal cavity

Anterior cranial fossa separated by cribiform plate

21

Lateral to upper part of the nasal cavity

Ethmoidal air cells and orbit

22

Lateral to lower part of nasal cavity

Maxillary sinus

23

Inferior relationship to nasal cavity

Oral cavity separated by hard palate

24

Posterior relationship to the nasal cavity

Nasopharynx via choanae

25

Composition of the bony walls of the nasal cavity: floor

Hard palate (palatine processes of maxillae and horizontal plates of palatine bones

26

Composition of the bony walls of the nasal cavity: roof

From anterior to posterior: nasal bone, nasal spins of frontal bone, cribiform plate of ethmoid, anterior and inferior aspects of body of sphenoid

27

Composition of the bony walls of the nasal cavity: medial wall (nasal septum)

Perpendicular plate of ethmoid and vomer ( and small contributions from sphenoid, maxilla, and palatine)

28

Composition of the bony walls of the nasal cavity: lateral wall

Maxilla, lacrimal bone, inferior nasal choncha, ethmoidal labyrinth, perpendicular plate of palatine, and medial pterygoid plate

29

What are the 3 scroll-like bony projections on the lateral wall f the nasal cavity?

Superior, middle, and inferior nasal conchae

30

What bones are the superior, middle, and inferior chonchae a part of?

Superior and middle belong to ethmoid, inferior concha is a separate bone