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Flashcards in FINALS: Paranasal Sinuses Deck (15)
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Cavities found in the interior of maxilla frontal sphenoid and ethmoid bones

Paranasal sinuses

1

Functions of paranasal sinuses

Act as resonators of the voice
Reduce the weight of the skull

2

Paranasal sinuses 4

Frontal
Maxillary
Ethmoidal
Sphenoidal

3

Located within the body of maxilla
Pyramidal in shape

Maxillary sinus

4

Maxillary sinus
Roof:
Floor:

R: floor of the orbit
F: alveolar process

5

Two in number
Contained in frontal bone
Triangular

Frontal sinus

6

Mucous membrane of frontal sinus is supplied by

Supraorbital nerve

7

Lie within sphenoid bon

Sphenoidal sinus

8

Sphenoidal sinus opens into the

Sphenoethmoidal recess

9

Mucous memb of sphenoidal sinus is supplied by

Posterior ethmoidal nerves

10

Contained within the ethmoid bone
Between nose and orbit

Ethmoidal sinus

11

3 grps of ethmoidal sinus

Ant
Middle
Post

12

Ant ethmoidal sinus opens in the

Infundibulum

13

Middle eth sinus opens

Middle meatus

14

Post eth sinus opens

Superior meatus