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H&N > H&N 4: Oral & Nasal Cavities #1 > Flashcards

H&N 4: Oral & Nasal Cavities #1 Flashcards

1
Q

What is the function of the mouth?

A
  • gateway to GI system

- where food + drink initially tasted, mixed with saliva, masticated + if deemed palatable, voluntarily swallowed

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2
Q

What is food processing through the gut like?

A
  • automatic

- go down pharynx, oesophagus + stomach

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3
Q

List 2 areas oral cavity made up of

A
  1. Vestibule

2. Oral cavity proper

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4
Q

What is the vestibule?

A
  • space between teeth + mucosal inner lining of cheeks + lips
  • communicates with behind last molar tooth (3rd for most)
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5
Q

What is the oral cavity proper?

A

space contained within the upper + lower dental arches + filled by tongue when mouth open

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6
Q

What is under the palatopharyngeal arch?

A

palatopharyngeus

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7
Q

What does the palatine tonsil form part of?

A

ring of lymphoid tissue found in oral cavity

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8
Q

What is under the palatoglossal arch?

A

Palatoglossus

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9
Q

Where is the hard palate?

A

behind upper teeth

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10
Q

What is function of soft palate?

A

cuts nasal from oral cavity during swallowing

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11
Q

Why does the tongue have a rough surface?

A

due to keratinisation

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12
Q

How does the mucous mem of bottom of tongue compare to top?

A

thinner

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13
Q

What is lingual frenulum?

A

connects tongue to floor of mouth

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14
Q

What does the skeleton of the oral cavity consist of?

A
  • maxilla + palatine - form roof

- maxilla + mandible with dental arches form ant. boundary

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15
Q

What does the floor + post. walls of oral cavity formed by + sig?

A
  • soft tissues

- poss to put food in mouth

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16
Q

What is the function of the maxilla?

A
  • forms ant. boundary of upper part of oral cavity
  • forms ant. 2/3 of roof
  • sep oral from nasal cavity
17
Q

What is the remaining 1/3 of roof formed by?

A
  • palatine (horizontal plate) to which soft palate attached
18
Q

List the muscles of the soft palate (post. aspect)

A
  • levator palati
  • palatopharyngeus
  • palatoglossus
  • tensor palati
19
Q

What is function of levator + tensor palati?

A

tense + raise soft palate to close off nasal cavity during swallowing

20
Q

What is the function of palatopharyngeus + palatoglossus?

A

hold soft palate down so still breathe while chewing + food doesn’t go from oral cavity into pharynx + resp system

21
Q

What is the function of buccinator + nerve its supplied by?

A
  • push cheek towards teeth to stop food entering vestibule during chewing
  • supplied by facial nerve
22
Q

What is function of genioglossus and its origin?

A
  • forms bulk of tongue
  • comes from mandible bend
  • use to poke tongue out
23
Q

Where is geniohyoid located?

A

from bend in mandible to hyoid bone

24
Q

What is function of ant. belly of digastric + mylohyoid + what are they supplied by?

A
  • relax to allow food to enter mouth
  • move larynx up during swallowing to get it out of the way
  • mandibular division of V
25
Q

What is the floor of the mouth formed by?

A
  • mucuous mem
  • muscles:
  • mylohyoid
  • geniohyoid
  • ant. belly of digastric
26
Q

What is the function of the raphe in the floor of the mouth?

A

where 2 halves of mylohyoid meet

27
Q

Where is the parotid gland located?

A

fills space between mastoid process + mandible ramus

28
Q

What are the lips?

A
  • mobile muscular folds (orbicularis oris) surrounding the mouth externally by skin + internally by mucous mem
29
Q

What is the vermillion border + its sig?

A
  • transitional zone between skin of lips + mucous mem

- doesn’t contain glands so lips need to be licked to moisten them

30
Q

What is the role of the muscles of the face?

A
  • facial expression

- functioning of the mouth

31
Q

What is the function of the lips?

A
  • form seal preventing food preventing food falling out of mouth during mastication
  • form seal around any vessel pressed against them so liquid enters mouth + doesn’t drip between mouth + cup
32
Q

What is closure of mouth + sealing of lips also important for?

A

swallowing

33
Q

List the contents of the oral cavity?

A
  • teeth
  • tongue
  • ducts of salivary glands
34
Q

What is the function of the laryngopharynx?

A

when swallow, move forward to stop food going down trachea

35
Q

What does mouth communicate with post.?

A

oropharynx

36
Q

How many teeth are there and when do they arise?

A
  • 32

- 6-18yrs

37
Q

What is the peridontal lig?

A

collagen fibres that attach from root of tooth into bone

38
Q

What is function of peridontal lig?

A

acts as shock absorber when eat something hard to allow movement of teeth + prevent shattering

39
Q

How are the teeth arranged?

A
  • into quarters

- 8 teeth in each

H&N (10 decks)

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