Nose

Question 1

Describe the 6 features of the external nose

Answer 1

Root (superior)
Dorsum (length)
Apex (tip)
Naris (nostrils)
Nasal septum (divides nostrils)
Ala (flares of nostrils)

Question 2

What is the difference between the root, dorsum and apex of the external nose?

Answer 2

Root (most superior aspect)
Dorsum (length of external nose)
Apex (tip of nose)

Question 3

What are the 3 cartilaginous segments making up the external nose?

Answer 3

2 x lateral cartilage (superior lateral)

2 x alar cartilage (inferior lateral)

1 x septal cartilage (midline)

Question 4

Which 3 bones contribute to the external nose?

Answer 4

Frontal (nasal component & nasal spine)

Maxillae (frontal processes)

Nasal bones

Question 5

Describe the anatomy of the nasal septum

Answer 5

• runs along midline of nose and divides nose into two cavities / naris

borders made up by:

• anterior: septal cartilage
• superior: ethmoid (perpendicular plate)
• inferior: vomer
• base: palatine and maxillae (nasal crests)
• vomer inferiorly

Question 6

Describe the conchae and meatuses of the nasal cavity

Answer 6

Three conchae:
superior, middle & inferior

Three meatus (space between conchae):
superior, middle, inferior

Question 7

Which duct drains into the inferior meatus of the nose?

Answer 7

Lacrimal duct

Question 8

Which structure connects to the inferior meatus of the nose?

Answer 8

The pharyngotympanic (Eustachian) tube, connecting the nose to the middle ear

Question 9

Which are the paranasal sinuses?

Answer 9

Frontal (paired)
Sphenoid (paired)
Ethmoid (multiple)
Maxillary (paired)

Question 10

Where do the paranasal sinuses drain?

Answer 10

The 4 paranasal sinuses drain into the superior and middle meatus of the nasal cavity

Question 11

What are the components and borders of the nasal cavity?

Answer 11

Anterior opening:
- naris

Posterior opening:

• connection to nasopharynx (through chonae)
• connection to pharyngotympanic (Eustachian) tube connecting to middle ear

Vestibule:
- anterior component of cavity, lined with skin and hairs

Lateral wall:
Nasal conchae & meatuses

Midline: nasal septum