Where in the skull are sinuses not located?

Sinuses are air-filled spaces located within the bones of the skull, and they have various functions, including reducing the weight of the skull, enhancing voice resonance, and contributing to the mucosal lining of the nasal cavity.

The temporal bone does not have any sinuses associated with it, making it the correct answer to the question. The other options—frontal, ethmoid, and sphenoid bones—are all regions of the skull that contain sinuses.

The frontal bone houses the frontal sinuses, which are located above the eyebrows. The ethmoid bone contains ethmoidal cells, which are a group of small air cells located between the eyes. The sphenoid bone contains the sphenoidal sinuses, which are situated behind the nose. Each of these sinus cavities plays a role in sinus drainage and respiratory function.

Since the temporal bone does not contain any sinus cavities, it stands out as the correct choice for this question.