How many passageways do each nasal cavity of the nose have to warm, clean, and humidify air?

• A. One
• B. Two
• C. Three
• D. Four

Answer: (B)

Each nasal cavity contains three distinct passageways known as the superior, middle, and inferior nasal meatuses. These structures facilitate the warming, cleaning, and humidifying of the air as it passes through the nasal cavity.

As air enters the nasal cavity, it is directed through these meatuses, which are located beneath the respective concha (or turbinates) that line the nasal walls. The conchae increase the surface area for air contact and help to create turbulence, ensuring that the air is thoroughly filtered and conditioned. This process is essential for preparing the air before it reaches the lungs, making it suitable for respiration.

The option indicating two passageways is not correct, as it does not account for the full anatomical complexity and functional capability of the nasal cavities in air processing.