Anatomy and Physiology II Practice Test

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Which cavities are identified as sinuses?

Frontal, parietal, and occipital
Frontal, maxillary, sphenoidal, and ethmoidal
Temporal, nasal, and maxillary
Ethmoidal, sphenoidal, and zygomatic

The correct answer is: Frontal, maxillary, sphenoidal, and ethmoidal

The identified cavities known as sinuses include the frontal, maxillary, sphenoidal, and ethmoidal sinuses. These air-filled spaces are located within the bones of the skull and serve various functions, such as reducing the weight of the skull, enhancing resonance of the voice, and contributing to the humidification and filtration of inhaled air. The frontal sinuses are situated in the forehead above the eyes, the maxillary sinuses are located in the cheeks, the sphenoidal sinuses are found behind the eyes within the sphenoid bone, and the ethmoidal sinuses are located between the eyes, within the ethmoid bone. Together, they play a crucial role in respiratory health as well as in protecting the structures of the head and face. Other options include combinations of bones that do not specifically correspond to recognized sinus cavities. Parietal and occipital bones, for instance, do not contain significant sinus structures, and temporal, nasal, or zygomatic bones are not known for having established sinus cavities. Hence, the choice highlighting the frontal, maxillary, sphenoidal, and ethmoidal sinuses accurately lists the recognized paranasal sinuses within the anatomy of the human body.