Lecture 6: Nasal And Oral Cavities Flashcards Preview

CHI 280: Human Anatomy I > Lecture 6: Nasal And Oral Cavities > Flashcards

Flashcards in Lecture 6: Nasal And Oral Cavities Deck (25):
1

Meatus are natural canals inferior to the nasal conchae.
Most paranasal sinuses drain to?

Middle nasal meatus

2

Memorise the picture on slide 10

Good one

3

What divides the nasal cavity into two chambers?

Nasal septum

4

What are choanae? "Funnels

-Internal nostrils
-point of transition from nasal cavity to nasopharynx
Slide 12

5

Why do you have to sniff to really smell something?

Because the respiratory area in the nasal cavity is before th olfactory area were odours are detected.

6

What is the nerve innervation of the nasal cavity?

General sensory:
Anterosuperior= ophthalmic nerve (CN V1)
Posteriorsuperior= maxillary nerve (CN V2)
Slide 15

7

What are the 4 paired paranasal sinuses?

Frontal
Ethmoidal
Sphenoidal
Maxillary
Slide16

8

What is the function of the paranasal sinuses?

-they are lined with respiratory epithelium (pseudostratified columnar with cilia)
-filled with air => lightens weight of viscerocranium
-communicate with nasal cavity through small Ostia
-assist in warming and humidifying inspired air
-add some resonance to voice
-drain mucus to nasal cavities via cilia

9

We're would you palpate all of the sinuses?

Refer to slide 19

10

How are each of the paranasal sinuses innervated?

Frontal sinus?
Supraorbital nerve
Maxillary sinus?
Infraorbital nerve- pain refers to dental arch slide 23

11

What is rhinosinusitis?

Inflammation of paranasal sinuses (usually ethmoid and maxillary)
Caused by obstruction of discharge of normal sinus secretions which compromises normal sterility.
-nasal congestion, facial pain/ pressure, fever, headache, painful maxillary teeth

12

Study the picture of the nasopharynx, oropharynx, and laryngopharynx.

Slide 28

13

Pharyngeal tonsils. What are they, what's their purpose?

They are adenoids which trap and destroy pathogens entering nasopharynx in air

14

What closes during swallowing go prevent food entering the nasal cavity?

Pharyngeal isthmus

15

What area is covered by the ora vestibule and the oral cavity proper slide 36

Oral vestibule: space between teeth and cheeks
Oral cavity proper: space between upper and lower dental arches

16

Learn slide 39 - mandible

Do it

17

Learn slide 41- teeth

Do it

18

What vessels supply the:
Maxillary Upper dental arch
Mandibular lower dental arch

Superior alveolar artery
Inferior alveolar artery
Both arteries branch from Maxillary artery

19

What nerve innervated the gingivae and teeth?

Mandibular nerve CN V3
Which the superior alveolar nerve and inferior alveolar nerve branches off

20

What are the 5 muscles of the soft palate?
Slide 45
And their blood supply, venous drainage, sensory and motor nerves

-tensor veli palatini
-levator veli palatini
-palatoglossus
-palatopharyngeus
-musculus uvulae

Blood supply: gated palatine (branch of maxillary artery)
Venous drainage: pterygoid venous plexus
Sensory: glossopharyngeal CN 9
Motor: vagus

21

Memorise slide 46- tongue

Extrinsic muscles late position of tongue
Intrinsic muscles alter shape of tongue
Motor innervation: hypoglossal nerve (CN 12)

22

What are the muscles of the below tongue?
Know how to label them. Slide 48

Styloglossus
Hyoglossus
Genioglossus

23

What is the blood supply to the tongue

External carotid artery

24

Innervation of the tongue. Slide 51

Fark that

25

What causes a cleft lip and palate?

Failure of messenchymal masses (which go on to be lip/ palate) to meet and fuse in the mid line.