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Head and Neck > Anatomy of nose and nasal cavity > Flashcards

Anatomy of nose and nasal cavity Flashcards

1
Q

What is the external nose?

A

The prominent part of the nose

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2
Q

What are the parts of the external nose?

A

Bony part

Cartilaginous part

Vestibule

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3
Q

Which bones form the bony part of the nose?

A

Nasal bones

Maxilla - frontal process

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4
Q

What lines the vestibule?

A

Skin

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5
Q

What does the skin of the vestibule contain?

A

Nasal hair

Sebaceous glands

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6
Q

What are the openings of the external nose?

A

Nostrils

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7
Q

What is the clinical signifiance of the external nose being prominent?

A

Nasal bones are commonly fractured

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8
Q

What is the nasal cavity?

A

Large air-filled space behind the external nose

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9
Q

What lines the nasal cavity?

A

Mucous membrane

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10
Q

What types of mucous membranes line the nasal cavity?

A

Olfactory mucous membrane

Respiratory mucous membrane

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11
Q

Where does the olfactory mucous membrane line the nasal cavity?

A

Roof of nasal cavity

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12
Q

Where does the respiratory mucous membrane line the nasal cavity?

A

All of nasal cavity that’s not the roof

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13
Q

What does the olfactory mucous membrane contain?

A

Ends of the CN1 olfactory nerve

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14
Q

What does the respiratory mucous membrane of the nasal cavity contain?

A

Mucus-producing glands

Cilia

Rich blood supply

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15
Q

What are the functions of the respiratory mucous membrane of the nasal cavity?

A

Filters the inspired air

Humdifies the inspired air

Warms the inspired air

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16
Q

How does the respiratory mucous membrane filter the inspired air?

A

Mucus traps particles

cilia waft mucus to oropharynx to be swallowed

17
Q

How does the respiratory mucous membrane humidify the inspired air?

A

Mucus glands produce watery secretions

water evaporates into inspired air as water vapour

18
Q

How does the respiratory mucous membrane warm the inspired air?

A

Has rich blood supply, which is of core body temperature

heat moves from the blood to the inspired air

19
Q

How is the nasal cavity adapted for the functions of the respiratory mucous membrane lining it?

A

Large cross-sectional area
slows flow of air down

Conchae make air flow turbulent, slows flow of air down
increase surface area of respiratory mucous membrane

altogether more contact time with respiratory mucous membrane

20
Q

What drains into the nasal cavity?

A

Air flow paranasal sinuses

Tears from nasolacrimal duct

21
Q

What are the borders of the nasal cavity?

A

Roof

Floor

Medial wall

Lateral wall

22
Q

What forms the roof of the nasal cavity?

A

Frontal bone

Ethmoid bone - crista galli, cribriform plate

Sphenoid bone

23
Q

What forms the floor of the nasal cavity?

A

The palate

24
Q

What forms the medial wall of the nasal cavity?

A

Posteriorly, ethmoid bone - perpendicular plate
vomer

Anteriorly the septal cartilage

25
Q

What forms the lateral wall of the nasal cavity?

A

Conchae

Meatuses

26
Q

What are conchae?

A

Bony projections from the lateral wall of the nasal cavity

27
Q

How many conchae are there?

A

Three

28
Q

What are the three conchae?

A

Superior

Middle

Inferior

29
Q

What bones do the three conchae arise from?

A

Superior and middle from ethmoid bone

Inferior is its own bone

30
Q

What are meatuses?

A

Air-filled spaces between the conchae

31
Q

What parts of the nasal cavity do the paranasal sinuses and nasolacrimal duct drain into?

A

The meatuses

32
Q

What nerve does sensory innervation to the nose and nasal cavity?

A

Anteriorly, the opthalmic branch of the CN5 trigeminal nerve

Posteriorly, the maxillary branch of the CN5 trigeminal nerve

Head and Neck (54 decks)

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