Final answer:
The largest paranasal sinus is the maxillary sinus, which is prone to infections due to its location and difficulty to drain.
Step-by-step explanation:
The largest paranasal sinus is the maxillary sinus. These sinuses are paired and located within the right and left maxillary bones, occupying the area just below the orbits. The maxillary sinuses are especially significant because they are most commonly involved during sinus infections. Their anatomical position makes them difficult to drain as their connection to the nasal cavity is located high on their medial wall.
The paranasal sinuses are air-filled spaces within the skull that are connected to the nasal cavity. They serve several purposes; they help to warm and humidify incoming air, produce mucus, and reduce the weight of the skull. Besides the maxillary sinus, other paranasal sinuses include the frontal, ethmoidal, and sphenoidal sinuses.