Bones and cartilages of the nose

Question 1

What are the functions of the nose?

Answer 1

Traps dirt

Respiratory

Humidification of inspired air

Olfaction

Question 2

What is the nose made up of?

Answer 2

External nose and nasal cavity

Question 3

What does the external nose have?

Answer 3

A nony framework from which the nasal and septal cartilages extend

Question 4

What is the nasal vavity divided by?

Answer 4

Midline nasal septum

Question 5

What does the nasal cavity continue posterior with?

Answer 5

Space of nasopharynx

Question 6

What is the palate?

Answer 6

Forms the floor of the nasal cavity and seperates it from the oral cavity

Question 7

What is the palate made up of anterioly and psoteriorly?

Answer 7

It is made of a vault-shaped bony palate anteriorly and posteriorly a soft palate that hangs between the nasopharynx and the oro-pharynx.

Question 8

What is the oral cavity?

Answer 8

First part of the digestive system, seperated from the nasal cavoity above by the palate and houses the tongue and salivary glands

Question 9

What is the larynx?

Answer 9

Voice box

Has a triple function

Open valve in respiration

Partially closed valve whose orifice can be modulated in phonation

Closed valve, protecting the trachea and bronchial tree during deglutition. Coughing is possible only when the larynx can be closed effectively.

Question 10

Answer 10

Question 11

What is the pharynx?

Answer 11

Musculofascial tube, incomplete anteriorly which extends from the base of the skull to the pesophagus

Common entry for resp and alimentrary tracts

Important in swallowing and breathing

Question 12

What are the 3 parts of the pharynx?

Answer 12

Nasopharynx- Lying behind nasal fossae and above the soft palate

Oropharync- Lyign behid the anterior pillars of the fauces

Laryngopharynx- Lying behind the larynx

Question 13

What does the trachea begin from?

Answer 13

The lower border of the larynx – (lower border of the cricoid cartilage, C6 vertebra).

Question 14

What does the trachea lie anterior to?

Answer 14

The oesophagus

Question 15

What happens at C6 to the pharynx?

Answer 15

The oesophgus starts from the lower part of the pharynx

Question 16

Locate the nasion on the image on the right. With which bone do the nasal bones articulate superiorly at the nasion?

Answer 16

The frontal bone

Question 17

Answer 17

Question 18

What is the part at the bridge of your nose that goes floppy?

Answer 18

Due to the presence of plates of cartilage which projects anteriorly from the margin of the nasal bones.

Question 19

Also what is the green bone called?

Also where is the cribiform plate?

Answer 19

Ethmoid bone

Cribiform plate is yellow bit at the top

Question 20

What is the roof of the nose formed from?

Answer 20

Formed from, (anterior to posterior) the nasal bones, part of the frontal bone as well as the ethmoid bone and the body of the sphenoid bone.

The part of the ethmoid bone that contributes to the roof of the nasal cavity contains the cribriform plate

Question 21

What is the floor of the nasal cavity formed from?

Answer 21

Palatine processses of the maxillae and the palatine bones which forms the hard palate

THe floor of the nasal cavity is extended posteriorly by the soft palate

Question 22

What does the nasal septum do?

Answer 22

Divides the nasal cavity into 2 halves

Question 23

What bones form the nasal septum?

Answer 23

Vomer bone

Perpendicular plate of ethmoid bone

Question 24

What structure lies anterior to the 2 bones of the nasal septum and completes the nasal septum?

Answer 24

Septal cartilage

Question 25

Answer 25

Question 26

What happens if there is a severe deviated nasal septum?

Answer 26

May lead to obstruction of one side of the nasal cavity.

Question 27

What effect would a severely deviated nasal septum have on the drainage of the paranasal air sinuses?

Answer 27

Obstruct drainage from the sinuses at one side – unilateral blockage.

Question 28

What passes through the cribitform plate?

Answer 28

Filaments of the olfactory nerve

Question 29

What attaches to the crista galli?

Answer 29

Anterior end of the falx cerebri

Question 30

What are some parts of the ehtmoid bone?

Answer 30

Question 31

Answer 31

Question 32

Answer 32

Question 33

Answer 33

Question 34

What passes through the ethmoid bone?

Answer 34

• The cribriform plate*
• The crista galli*
• The central plate*
• The superior and middle conchae*
• The ethmoid air cells*