Question
Identify the sinus that is labeled in the provided image.
| A. |
Frontal sinus
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| B. |
Pyriform sinus
|
| C. |
Ethmoid sinus
|
| D. |
Maxillary sinus
|
Show Answer
|
Correct Answer � D
Explanation
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|
The maxillary sinuses are the largest of the paranasal sinuses.
They are located within the maxillary bones of the skull,
Because of their location, the maxillary sinuses are susceptible to infection or inflammation, which can cause symptoms such as pain or pressure in the cheeks or upper teeth, congestion, headache, or fever.
Reasons to rule out other options
Option A: The frontal sinuses are located in the skull’s frontal bone, which forms the forehead and the upper part of the eye sockets.. The frontal sinuses are separated from each other by a bony partition called the septum, and they are connected to the nasal cavity by small openings called ostia.
Option B: The pyriform sinus is shaped like a teardrop and is formed by the convergence of several muscles in the hypopharynx. It is located on either side of the larynx.
Option C: The ethmoid sinuses are located in the ethmoid bone, which is located in the skull between the eyes and behind the nasal bones.
