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Gross Anatomy Block 4 > Nasal Cavity And Paranasal Sinus > Flashcards

Nasal Cavity And Paranasal Sinus Flashcards

1
Q

Nasal septum divides?

A

Nostrils

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2
Q

Another septum divides what 2 things?

A

External nose and nasal cavity

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3
Q

What is the ala nosi?

A

Rounded, mobile lateral margin

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4
Q

External nose is made of what parts of what 3 bones?

A

Nasal bones, nasal part of frontal bone, and frontal processes of maxilla

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5
Q

Below, the framework is formed by ?

A

Plates of hyaline cartilage

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6
Q
  1. Skin of external nose is supplies by branches of what 2 arteries (be specific)?
  2. Skin of the ala/lower part of septum are supplied by branches of what artery?
A
  1. Infratrochlear and external nasal branches of ophthalmic nerve and infraorbital branch of maxillary nerve
  2. Branches from facial artery
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7
Q

Floor of the nasal cavity is formed by what 2 things?

A

Palatine process of maxilla and horizontal plate of palatine bone

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8
Q

Roof of nasal cavity:

  1. Formed anteriorly by?
  2. Formed medially by? Located beneath?
  3. Formed posteriorly by?
A
  1. Nasal and frontal bones
  2. Cribiform plate of ethmoid; located beneath anterior cranial fossa
  3. Sphenoid
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9
Q

Medial wall of nasal cavity:

  1. AKA
  2. Made of what 2 substances?
  3. Consists of what 2 bones?
  4. Divides what 2 things?
A
  1. Nasal septum
  2. Bone and cartilage
  3. Ethmoid and vomer
  4. Right and left nasal cavity
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10
Q

Lateral walls of nasal cavity is marked by what 3 things?

Concha vs meatus?

A

Superior, middle, and inferior concha; meatus is the space below each concha

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11
Q

What are the openings to the following parts of the lateral walls of nasal cavity:

  1. Inferior meatus
  2. Middle meatus (3)
  3. Superior meatus
  4. Sphenoethmoidal recess
A
  1. Nasolacrimal duct
  2. Maxillary, frontal, and anterior ethmoid sinuses
  3. Posterior ethmoid sinuses
  4. Sphenoid sinus
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12
Q
  1. Maxillary, anterior and middle ethmoidal air cells and frontal sinuses open into
  2. Sphenoid sinus opens into?
  3. Posterior ethmoidal air cells open into?
  4. Nasolacrimal canal drains into
A
  1. Middle meatus
  2. Sphenoethmoidal recess
  3. Superior meatus
  4. Inferior meatus
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13
Q
  1. Most important branch of the maxillary artery for the nasal cavity?
  2. What does this artery anastomose with? Where?
  3. __ venous plexus is drained by veins that accompany the arteries
A
  1. Sphenopalatine artery
  2. Septal branch of superior labial branch of the facial artery; in the region of the vestibule
  3. Submucous venous plexus
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14
Q

What 2 nerves supply ordinary sensation to the nasal cavity?

What nerves supply special visceral afferent?

A

Branches of V1 and V2

Olfactory nerves (CN I)

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15
Q
  1. Lymph vessels draining the vestibule end in what nodes?

2. Remainder of nasal cavity is drained by vessels that pass to what nodes?

A
  1. Submandibular nodes

2. Upper deep cervical nodes

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16
Q

Paranasal sinuses:

  1. Found in the interior of what 4 bones
  2. Lined with? Filled with?
  3. Communicate with __
A
  1. Maxilla, frontal, sphenoid, and ethmoid
  2. Mucoperiosteum; filled with air
  3. Nasal cavity
17
Q

How is the mucus produced moved into the nose?

How is drainage of mucus achieved?

A

By ciliary action of columnar cells

Siphon action created during blowing your nose

18
Q

4 functions of the paranasal sinuses?

A

Resonators of the voice, reduce skulls weight, help warm/moisten inhaled air, act as shock absorbers in trauma

19
Q

Maxillary sinus:

  1. Shape
  2. Location
  3. Roof is formed by
  4. Floor is related to
  5. Opens into?
A
  1. Pyramidal; paired and symmetric
  2. Behind the skin of the cheek
  3. Floor of the orbit
  4. Roots of 2nd premolars and 1st molar teeth
  5. Middle meatus of the nose
20
Q

Frontal sinuses:

  1. Location
  2. How are they separated from each other?
  3. Shape?
  4. Extends upward above?
  5. Opens into?
A
  1. Within the frontal bone
  2. By a bony septum
  3. Triangular; rarely symmetrical
  4. Above medial end of the eyebrow and backward into medial part of roof of orbit
  5. Opens into the middle meatus
21
Q

Sphenoidal sinus:

  1. Location
  2. Extends from where to where
  3. Opens into?
A
  1. Within the body of the sphenoid
  2. Between dorsum sellae and post clinoid process (below sella turcica)
  3. Sphenoethmoidal recess above the superior concha
22
Q

Ethmoid sinuses (anterior, middle, and posterior):

  1. Location
  2. Anterior and middle drain into?
  3. Posterior drains into?
  4. Why are they separated from the orbit?
A
  1. Within ethmoid bone; between nose and orbit
  2. Middle nasal meatus
  3. Superior nasal meatus
  4. So infection cannot readily spread from the sinuses to orbit
23
Q

What will happen if the paranasal sinuses apertures are blocked or filled with fluid?

A

Your voice will change

Gross Anatomy Block 4 (14 decks)

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