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General Anatomy 2 > Nose > Flashcards

Nose Flashcards

1
Q

Components of nose

A
  1. External nose
  2. Nasal cavity

*divided by septum

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2
Q
  • has a free tip
  • attached to the forehead by the nasal bridge/ root
  • two elliptical orifices called the nostrils
  • separated from each other by the nasal septum
  • lateral margin, the ala nasi - rounded and mobile
A

EXTERNAL NOSE

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3
Q

Framework of the external nose

A
  • Above
    ○ Nasal bone
    ○ Frontal process of the maxillae
    ○ Nasal part of the frontal bone
- Below
○ Plates or hyaline
cartilage
○ Upper nasal cartilages
○ Lower nasal cartilages
○ Septal cartilage
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4
Q

Blood supply of the skin of the external nose

A
  1. Ophthalmic artery

2. Maxillary artery

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5
Q

Blood supply of the skin of the ala and the lower part of the septum

A
  1. Facial artery
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6
Q

Nerve supply of the external nose

A
  1. Infratrochlear and external nasal branches of the ophthalmic nerve
  2. Infraorbital branch of the maxillary nerve
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7
Q
  • extends from the nostrils in front to the choanae behind
  • divided by the nasal septum into right and left halves.
  • each half consist of floor, roof, lateral wall, and medial wall
A

NASAL CAVITY

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8
Q
  • formed by:
    ○ palatine process of the maxilla
    ○ horizontal plate of the palatine bone.
A

FLOOR OF NASAL CAVITY

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9
Q 
- formed by:
○ body of the sphenoid
○ cribriform plate of the ethmoid
○ frontal bone
○ nasal bone and the nasal cartilages
A

ROOF OF NASAL CAVITY

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10
Q
  • located on the roof of the nasal cavity
  • contains cells/receptors which are in contact with the olfactory bulb and nerve to provide sense of smell
  • 5% of nasal cavity area
A

OLFACTORY MEMBRANE

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11
Q
  • has three projections:
    ○ Superior conchae
    ○ Middle conchae
    ○ Inferior conchae
A

LATERAL WALL OF NASAL CAVITY

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12
Q
  • small area of the nose that lies above the superior concha and in front of the body of the sphenoid bone
  • receives the opening of the sphenoidal air sinus
A

SPHENOETHMOIDAL RECESS

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13
Q
  • the area below each conchae

- has superior, middle, and inferior

A

MEATUS

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14
Q
  • lies below and lateral to the superior concha

- receives the openings of the posterior ethmoidal sinuses.

A

SUPERIOR MEATUS

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15
Q
  • lies below and lateral to the inferior concha

- receives the opening of the nasolacrimal duct

A

INFERIOR MEATUS

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17
Q
  • lies below and lateral to the middle concha
A

MIDDLE MEATUS

18
Q
  • a curved cleft
  • lies immediately below the bulla
  • leads to the opening of the maxillary sinus into the middle
A

HIATUS SEMILURANIS

19
Q
  • an osteocartilaginous partition
  • composed of:
    ○ upper part – formed by vertical plate of the ethmoid
    ○ posterior part – formed by the vomer.
    ○ anterior portion – formed by the septal cartilage
A

MEDIAL WALL OF NASAL CAVITY OR NASAL SEPTUM

20
Q
  • lines the nasal cavity except the vestibules which is lined by modified skin
  • two types:
    ○ olfactory
    ○ respiratory
A

MUCOUS MEMBRANE

21
Q
  • lines the upper surface of the superior concha and the spheno-ethmoidal recess.
  • also lines a corresponding area on the nasal septum and lines the roof.
  • serves as the reception of olfactory stimuli
A

OLFACTORY MUCOUS MEMBRANE

22
Q
  • lines the lower part of the nasal cavity

- to warm, moisten, and clean the inspired ai

A

RESPIRATORY MUCOUS MEMBRANE

23
Q

Nerve supply of the nasal cavity

A
  1. Olfactory nerves
  2. Ophthalmic and maxillary division of the trigeminal nerve
  3. Anterior ethmoidal nerve
  4. Nasal, nasopalatine, and palatine branches of the pterygopalatine ganglion
24
Q
  • arise from the special olfactory
    cells in the olfactory mucous membrane
  • ascend through the cribriform plate to reach the olfactory bulbs
A

OLFACTORY NERVE

25
Q
  • nerves of ordinary sensation
A

OPHTHALMIC AND MAXILLARY DIVISION OF TRIGEMINAL NERVE

26
Q
  • nerve supply to the anterior part of the nasal cavity
A

ANTERIOR ETHMOIDAL NERVE

27
Q
  • nerve supply to the posterior part of the nasal cavity
A

NASAL, NASOPALATINE, AND PALATINE BRANCHES OF THE PTERYGOPALATINE GANGLION

28
Q

Blood supply of the nasal cavity

A
  1. Sphenopalatine artery
  • the veins form a rich plexus in the
    submucosa.
  • the plexus is drained by veins that accompany the arteries
29
Q
  • derived mainly from branches of the maxillary artery
  • most important branch
  • common site of bleeding from the nose (epistaxis)
A

SPHENOPALATINE ARTERY

30
Q
  • cavities found in the interior of the maxilla, frontal, sphenoid, and ethmoid bones
  • communicate with the nasal cavity through relatively small apertures
  • acts as resonators to the voice
  • resonators the weight of the skull
A

PARANASAL SINUSES

31
Q
  • located within the body of the maxilla
  • pyramidal in shape
  • roof is formed by the
    floor of the orbit
  • floor is formed by the alveolar process
A

MAXILLARY SINUS

32
Q
  • two in number
  • are contained within the frontal bone
  • separated from each other by a bony septum
  • roughly triangular triangular
  • mucous membrane is supplied by the supraorbital nerve
A

FRONTAL SINUSES

33
Q
  • two in number
  • lies within the body of the
    sphenoid bone
  • each sinus opens into the sphenoethmoidal recess above the superior concha
  • mucous membrane is supplied by the posterior ethmoidal nerves
A

SPHENOIDAL SINUSES

34
Q
  • contained within the ethmoid bone
  • between the nose and the orbit
  • seperated by a thin plate of bone
  • divided into three groups:
    ○ anterior – opens in the infundibulum
    ○ middle – opens into the middle meatus
    ○ posterior – opens in the superior meatus
A

ETHMOIDAL SINUSES

35
Q
  • funnel shaped channel

- connected to the frontal sinus and anterior ethmoidal sinuses

A

INFUNDIBULUM

General Anatomy 2 (4 decks)

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