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OCB > OCB04-2005 Oral and Nasal Cavities > Flashcards

OCB04-2005 Oral and Nasal Cavities Flashcards

1
Q

What is the vestibule?

A

The space between the teeth and the mucosal inner lining of the cheeks and lips

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2
Q

What is the oral cavity proper?

A

The space contained within the upper and lower dental arches and filled by the tongue

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3
Q

Why does the tongue look blue under the surface?

A

There is a deep lingual vein underneath the tongue that is superficially located

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4
Q

What is the purpose of the lingual frenulum?

A

It attaches the tongue to the floor

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5
Q

What bones from the roof of the mouth?

A

Maxilla and palatine bones

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6
Q

What is the buccinator?

A

A thin muscle occupying the interval between the maxilla and mandible at the side of the face. Its purpose is to flatten the cheek during chewing

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7
Q

What is the genioglossus?

A

A muscle that runs from the chin to the tongue

Responsible for protruding the tongue

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8
Q

What is the geniohyoid?

A

Muscle that runs from the chin to the hyoid bone

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9
Q

What is the mylohyoid?

A

A muscle running from the mandible to the hyoid bone, forming the floor of the oral cavity

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10
Q

Where is the mylohyoid derived from?

A

1st pharyngeal arch

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11
Q

What is the anterior belly of digastric?

A

A muscle located beneath the jaw.

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12
Q

What bone separate the oral and nasal cavity?

A

maxilla

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13
Q

What does the maxilla contribute to the oral cavity?

A

It forms the anterior boundary of the upper part of the oral cavity and anterior 2/3rds of the roof

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14
Q

What structures raise the soft palate to shut off the nasal from oral cavity when chewing?

A

levator palati

tensor palati

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15
Q

What are the functions of the lips?

A

Act as a sphincter
grasp food
Suckling speech

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16
Q

What is the blood supply to the lips?

A

upper and lower labial arteries

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17
Q

What is the nerve supply to the upper lip?

A

infraorbital (CN V2)

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18
Q

What is the nerve supply to the lower lip?

A

mental nerve (CN V3)

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19
Q

What encloses the buccinator muscles?

A

The cheeks enclose the buccinator muscles that are encapsulated in fat

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20
Q

What is the blood supply to the cheeks?

A

Buccal arteries that is a branch of the maxillary artery

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21
Q

What is the nerve supply to the cheeks?

A

The buccal branches of the mandibular nerve (CN V3)

22
Q

What is the vermillion border?

A

The transition zone that separates the external skin and internal mucous membrane

23
Q

Why does the vermillion border require moisture?

A

It does not contain glands

24
Q

What is the nerve supply to the muscles of lateral wall of the oral cavity?

A

Facial nerve

25
Q

What is the nerve supply to the muscles of floor of the oral cavity?

A

Geniohyoid supplied by fibres from C1

the mylohyoid and anterior belly of digastric by the mandibular branch for the trigeminal

26
Q

What is the nerve supply to the mucosal membrane of the roof of the oral cavity?

A

Maxillary nerve

27
Q

What is the nerve supply to the mucosal membrane of the lateral walls and floor of the oral cavity?

A

Mandibular division of the trigeminal

28
Q

Where is the tongue situated?

A

The anterior 2/3rds rests within the oral cavity whilst the posterior 1/3 lies in the oropharynx

29
Q

What is the role of intrinsic muscles of the tongue?

A

change the shape of the tongue

30
Q

What is the role of the extrinsic muscles of the tongue?

A

change its position

31
Q

What is the muscles tongue innervated by?

A

All muscles of the tongue except the palatoglossus are innervated by the hypoglossal nerve
The palatoglossus is innervated by the pharyngeal plexus

32
Q

What nerves responsible for general sensation innervate the tongue?

A

For general sensationthe anterior 2/3 is via the lingual nerve, a branch of CN V3

33
Q

What nerves responsible for taste innervate the tongue?

A

The Chorda tympani (CN VII)

34
Q

What is the posterior 1/3 of the tongue and vallate papillae supplied by?

A

Lingual branch of CN IX

35
Q

What is the blood supply to the tongue?

A

Lingual artery

36
Q

What is the venous drainage of the dorsal and sides of the tongue?

A

Posterior lingual veins, that lead to the lingual veins

The lingual vein drains into the internal jugular vein

37
Q

What does the remainder of the tongue venous drain into?

A

The deep lingual and sublingual veins that join to lead to the facial vein

38
Q

Where does the lymphatic drainage of the tongue occur?

A

Towards the deep cervical nodes

39
Q

Where do the ducts of the parotid glad enter the mouth?

A

Near the upper 2nd molar tooth

40
Q

What secretion is the parotid gland?

A

Serous

41
Q

Where does the duct for the submandibular gland enter the mouth?

A

Floor of the mouth

42
Q

What are the secretion of the submandibular gland?

A

serous and mucous

43
Q

Where does the sublingual gland enter the mouth?

A

It has between 16 and 20 short ducts which open in the floor of the mouth

44
Q

What are the secretions of the sublingual gland?

A

Mucus

45
Q

What are the functions of the minor salivary glands?

A

Maintains oral hygiene as the continual background level of secretion flushes the oral surfaces and helps to control the level of bacteria

46
Q

What is the function of the nose and nasal cavity?

A

Allows for smell
Forms upper protein of respiratory tract
Moistens and warms inspired air
Filters air to remove foreign particles

47
Q

What bones form the floor of the nasal cavity?

A

Palatine bone

48
Q

What bones form the roof of the nasal cavity?

A

The cribriform plate (ethmoid)

49
Q

What are the three circular tube-like protrusions in the lateral wall of the nasal cavity called?

A

Conchae

50
Q

What is the purpose of conchae?

A

Force incoming air to swirl around which slows it down sufficiently to be warmed and proper the dust and bacteria towards the mucus layer

OCB (16 decks)

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