Nose & Paranasal

Question 1

External nose:

Answer 1

nasal bones, paired lateral cartilages and alar cartilages (major alar cartilages) in the central and lower portions of the nose

Question 2

has by far the greatest functional importance because most of the drainage tracts from the surrounding sinuses open into it.

Answer 2

middle turbinate

Question 3

⚫️ Air-filled cavities that communicate with the nasal cavities

⚫️ Lined with mucoperiosteum and filled with air

Answer 3

Paranasal Sinuses

Question 4

⚫️ It is pyramidal
⚫️ Roof: floor of the orbit
⚫️ Floor: Alveolar process
⚫️ Mucous memebrane is supplied by the superior alveolar and infraorbital nerves.

Answer 4

Paranasal Sinuses: Maxillary Sinus

Question 5

⚫️ Roughly triangular, extending upward above the medial end of the eyebrow and backward into the medial part of the roof of the orbit
⚫️ Bounded behind by the anterior cranial fossa
⚫️ Mucous membrane is supplied by the supraorbital nerve.

Answer 5

Paranasal Sinuses: Frontal Sinus

Question 6

⚫️ Located at the approximate center of the skull above the nasopharynx.
⚫️ Volume: 7.5 ml

Answer 6

Paranasal Sinuses: Sphenoidal Sinus

Question 7

Superior and medial to the maxillary sinus

Answer 7

Paranasal Sinuses: Ethmoidal Sinus

Question 8

The mucosal lining of the paranasal sinuses is made up of a ____

Answer 8

ciliated cuboidal epithelium

Question 9

Funnel-shaped

Answer 9

Frontal sinuses

Question 10

an hourglass-like narrowing between the frontal sinus and the anterior middle meatus through which the frontal sinus drains.

Answer 10

Frontal recess

Question 11

⚫️ narrowest anterior air channels
⚫️ common sites of inflammation

Answer 11

Frontal recesses

Question 12

⚫️ an ethmoturbinal remnant that is present in nearly all individuals.
⚫️ It is aerated and represents the most anterior ethmoid air cell.
⚫️ usually borders the primary ostium or floor of the frontal sinus; thus, ⚫️ its size may directly influence the patency of the frontal recess and the anterior middle meatus.

Answer 12

agger nasi

Question 13

a superior extension of the lateral nasal wall (medial wall of the maxillary sinus)

Answer 13

uncinate process

Question 14

Usually the largest of the anterior ethmoid cells.

Answer 14

Ethmoid bulla

Question 15

The gap between the ethmoid bulla and the free edge of the uncinate process defines the ____

Answer 15

Hiatus semilunaris

Question 16

serves as the primary drainage pathway from the maxillary sinus

Answer 16

Infundibulum

Question 17

The anterior part of the nasal cavity (the nasal vestibule), like the external nose, is covered by skin composed of a multilayer ____

Answer 17

keratinizing squamous epithelium

Question 18

A small area on the upper nasal septum, superior turbinate, and part of the middle turbinate, located adjacent to the cribriform plate, is covered by olfactory mucosa and is called the ___

Answer 18

olfactory region