Which sinus is typically the largest of the paranasal sinuses?

The maxillary sinus is typically the largest of the paranasal sinuses, which is why it is the correct choice. Located within the maxilla (upper jaw), these sinuses are also known for their relatively large volume compared to the other paranasal sinuses. Their size and position allow for efficient drainage to the nasal cavity, which is important for respiratory health and preventing infections.

In contrast, the frontal sinus, while present and significant, tends to be smaller and varies greatly in size among individuals. The ethmoidal sinus comprises a constellation of small air cells rather than a single large cavity, leading to a lesser total volume than the maxillary sinus. The sphenoidal sinus, although further back in the skull, is also not as large as the maxillary sinus. Each of these sinuses has distinct anatomical characteristics and functions, but the maxillary sinus stands out as the largest due to its size and anatomical placement.