What are the nostrils, which are openings through the nose that allow air to enter the nasal cavities, called?

• A. Passages
• B. Nares
• C. Cavities
• D. Fossae

Answer: (B)

The nostrils are specifically referred to as "nares." This term is used in anatomical contexts to describe the external openings of the nose that facilitate the entry of air into the nasal cavities for respiration. The nares serve as the first part of the respiratory system, playing a vital role in filtering, warming, and humidifying the air before it moves deeper into the respiratory tract.

The other terms, while related to the respiratory system, do not accurately describe the nostrils. "Passages" is a general term that could refer to any route through which air or fluids can flow, but it lacks the specific anatomical context. "Cavities" refers to larger hollow spaces within the body, such as the nasal cavity but does not denote the openings themselves. "Fossae" generally refers to depressions or hollowed areas in bones and does not pertain to the nostrils directly. Understanding the distinction helps clarify the specific role of the nares within the overall respiratory system.