How many pairs of sinuses does a person typically have?

A person typically has four pairs of sinuses. These include the frontal, maxillary, ethmoidal, and sphenoidal sinuses. Understanding the function and location of these sinuses is important, as they play a role in reducing the weight of the skull, contributing to voice resonance, and helping to humidify and warm the air inhaled through the nose. Each pair of sinuses is located in different parts of the skull, and they communicate with the nasal cavity, which is critical for proper respiratory health. This anatomical arrangement is crucial for divers to recognize as it affects equalization and pressure changes during dives.