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Flashcards in Anatomy Deck (167)
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1

Which structure gives rise to the cupid's bow?

Philtrum

2

From which part of the nasal cavity to we get sense of smell?

Olfactory epithelium

3

Nasal septum - anterior component

Hyaline cartilage

4

Nasal septum - posterior compartment

Bony
- perpendicular place of ethmoid bone (superiorly)
- vomer (inferiorly)

5

What divides the nasal cavity from the anterior cranial fossa?

Cribiform plate of ethmoid bone

6

Where is the crista galli of the ethmoid located?

medially and superiorly.
Superior to the nasal septum

7

Which conchae are part of the ethmoid bone?

Superior and middle

8

Where are the conchae located?

In the lateral wall of the nasal cavity

9

Function of conchae?

They create turbulence of the nasal cavity which ultimately creates better gas exchange

10

Where are the meatuses in relation to the conchae?

The space under each concha where the paranasal sinuses drain into

11

What are paranasal sinuses?

Extensions of the nasal cavities which aim to make the skull lighter

12

Name the 4 paranasal sinuses

Frontal sinus (2)
Maxillary sinus - antra (2)
Ethmoidal air cells (2)
Sphenoid sinus (2)

13

Where do frontal sinuses drain to?

Middle meatus

14

Where do maxillary sinuses drain to?

Middle meatus

15

Where do ethmoidal air cells drain to?

Anterior and middle drain into middle meatus
Posterior drains into superior meatus

16

Where do sphenoid sinuses drain to?

Sphenoethmoidal recess

17

What drains into the inferior meatus?

Nasolacrimal duct

18

3 types of mucosa in the nasal cavities

Keratinised stratified squamous epithelium
Respiratory epithelium
Olfactory mucosa

19

Keratinised stratified squamous epithelium in the nasal cavities

Located at the entrance of the nostril
The verbose hairs here start to filter foreign objects out of the air that you are breathing in

20

Respiratory epithelium in nasal cavities

This makes up the majority of the nasal cavity mucosa
Columnar, glandular
Warms the air
Humidifies the air
Secretes mucous
Traps foreign bodies

21

Special sensory nerve supply to the nasal cavities (e.g. for smell)?

CN I (olfactory)

22

Where does CN 1 leave the brain?

Cribriform plate of ethmoid bone

23

Somatic nerve supply to the nasal cavities (e.g. for ho, cold, touch, pain)?

CNV1 (ophthalmic division) supplies anterosuperiorly

CNV2 (maxillary division) supplies posteroinferiorly

24

Which arteries does blood supply to the nasal cavities originate from?

External and internal carotid arteries

25

Branching of internal carotid artery which supplies the nasal cavities

Internal carotid artery ->
Ophthalmic artery ->
Anterior and Posterior ethmoidal artery -> supplies the medial and lateral walls of the nasal cavity

26

Branching of external carotid artery which supplies the nasal cavities

External carotid artery -> facial artery and maxillary artery

Facial artery -> lateral and septal branch

Maxillary artery -> sphenopalatine artery (lateral and medial walls), greater palatine (medial wall only)

27

What is Kiesselbach's area

The anastamotic site of the nasal arteries in the nasal septum.
It is the most common site of epistaxis (nosebleed)

28

NG tube is passed through the SUPERIOR/INFERIOR aspect of the nasal cavity

Inferior

29

How do you ensure an NG tube has been correctly inserted into a patient?

X-ray
- NG tube should remain in the midline down to the level of the diaphragm and the tip should be seen in the diaphragm

30

Temporal bone 2 parts

Squamous (flat)
Petrous (stony/rocky)