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meatus

   Also found in: Dictionary/thesaurus, Medical, Wikipedia 0.01 sec.
meatus [mē′ād·əs]
(anatomy)
A natural opening or passage in the body.


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The right middle turbinate was gently displaced medially, which allowed for visualization of the marked drainage from the right maxillary sinus flowing into the middle meatus (figure, C).
The posterior drains into the superior meatus under cover of the superior nasal concha; sometimes one or more opens into the sphenoidal sinus.
Cells that are part of the anterior ethmoid labyrinth drain into the middle meatus, and cells that belong to the posterior ethmoid labyrinth drain into the superior meatus and occasionally into the supreme meatus.
 
 
 
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